Draper Expert Combined MM/AF Socket Set, 1/4" Sq. Dr. (40 Piece)

The Draper Expert B40AMN/B 40-Piece Combined MM/AF Socket Set is a dual-standard 1/4" square drive toolkit built for professionals and experienced users who need reliable metric and imperial socket coverage alongside a comprehensive drive accessory package — all in a single, well-organised kit. Combining 12 metric and 9 imperial sockets with three wobble extension bars, a sliding T-bar, spinner handle, and an 11-piece screwdriver bit selection, the B40AMN/B delivers exceptional versatility for automotive, engineering, and general workshop applications where both fastener standards are encountered.

The socket complement covers 12 standard six-point metric sockets spanning 4–13mm — including the frequently omitted 4.5mm and 5.5mm intermediate sizes essential for modern vehicle electronics, sensor brackets, ECU housings, instrument panels, and bodywork trim fixings. Alongside these, 9 imperial AF sockets running from 3/16" to 1/2" provide the coverage needed for American vehicles, classic cars, motorcycles, marine engines, and imported machinery where inch-fraction fasteners remain standard fitment. Together, the 21-socket dual-standard selection handles the vast majority of small fastener applications encountered across both modern and classic vehicle work without the need to reach for a second set.

Every socket is manufactured from chrome vanadium steel, hardened, tempered, and finished to a high-polished chrome — combining a professional appearance with excellent corrosion resistance for long-term durability. The knurled ring on each socket provides a secure, tactile grip surface for confident one-handed placement in greasy, oily, or overhead conditions, while the six-point geometry maximises contact across fastener flats, reducing the risk of rounding on the small, precision-sensitive fixings common to 1/4" drive work.

The drive accessory package is one of the most complete available in a 40-piece 1/4" drive set. Six accessories provide comprehensive control over reach, angle, and torque application:

• 72-tooth reversible ratchet with quick-release button — a fine 5° swing arc for productive fastener engagement in confined spaces
• Spinner handle for rapid, fatigue-free fastener running once broken free
• Three wobble extension bars at 50mm, 100mm, and 150mm — a full-length trio providing shallow, medium, and deep reach with built-in off-axis flexibility at every length
• Sliding T-bar — for high-leverage breakaway force on stubborn fixings or rapid free-spinning without a ratchet
• Universal joint — for off-axis fastener access where no direct approach is available
• 1/4" Sq. Dr. to 1/4" hex bit adaptor — integrating the full insert bit range directly with the ratchet and extension bars

The provision of three wobble extension bars covering 50mm, 100mm, and 150mm is a particularly strong feature at this set size. Many comparable 40-piece sets include only two extension bars, or omit the 100mm middle length entirely — leaving a gap between shallow and deep access. The B40AMN/B's full three-bar complement ensures the right extension length is always to hand without resorting to stacking bars, which reduces stability and torque feel.

The 11-piece screwdriver insert bit selection covers four drive profiles representing the fastener types most commonly encountered in automotive and domestic applications:

4 plain slot bits: 3, 4, 5.5, 6.5mm — the widest plain slot range in the Draper Expert 1/4" lineup, covering miniature electrical and instrument fixings through to larger panel and appliance slotted fasteners.

2 cross slot (Phillips) bits: No.1, No.2 — covering the most widely used Phillips sizes for automotive and general fastening work.

2 Pozidriv (PZ-Type) bits: No.1, No.2 — for European vehicles and domestic appliances where Pozidriv is standard fitment. Using the correct PZ profile prevents the cam-out that damages fastener recesses when Phillips drivers are incorrectly substituted. PZ screws are ubiquitous across VW Group, BMW, Mercedes-Benz, and Stellantis vehicles, as well as across European domestic appliances and construction fixings.

3 TX-STAR® Torx bits: T15, T20, T25 — targeting the three Torx sizes most frequently encountered in automotive interior trim, dashboard panels, seat components, and door mechanisms. While a narrower Torx selection than some larger sets, T15, T20, and T25 cover the overwhelming majority of interior and trim Torx fasteners found across modern European and Asian vehicles.

All insert bits connect to the ratchet and extension bars via the included 1/4" square drive to 1/4" hex bit adaptor, turning the drive side of the set into a fully integrated ratcheting fastening system for all four bit profiles.

The complete 40-piece set is housed in a tough blow-moulded plastic storage case with dedicated recesses for every component — keeping the set complete, organised, and ready for workshop use or transport between jobs. As part of the Draper Expert range, the B40AMN/B is manufactured and tested in general accordance with DIN3122 and ISO3315 specifications, ensuring verified quality and dimensional accuracy throughout.

Key Features

• 40-piece combined metric and imperial socket set on a 1/4" square drive
• 12 standard metric sockets: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13mm — including 4.5mm and 5.5mm
• 9 imperial AF sockets: 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 1/2"
• Chrome vanadium steel — hardened, tempered, and polished chrome finish
• Knurled ring on every socket for secure one-handed grip
• Six-point socket geometry minimises fastener rounding
• 72-tooth reversible ratchet with quick-release button — 5° swing arc
• Spinner handle for rapid fastener running
• Three wobble extension bars: 50mm, 100mm, 150mm — full-length trio for shallow to deep access
• Sliding T-bar for high-leverage breakaway and free-spinning
• Universal joint for off-axis fastener access
• 1/4" Sq. Dr. to 1/4" hex bit adaptor
• 11 insert bits across four drive profiles
• 4 plain slot bits: 3, 4, 5.5, 6.5mm
• 2 cross slot (Phillips) bits: No.1, No.2
• 2 Pozidriv (PZ-Type) bits: No.1, No.2
• 3 TX-STAR® Torx bits: T15, T20, T25
• Tough plastic storage case with dedicated component locations
• Compliant with DIN3122 and ISO3315 specifications

What sockets are included in the Draper Expert B40AMN/B? The B40AMN/B includes 12 standard metric sockets (4–13mm, including 4.5mm and 5.5mm) and 9 imperial AF sockets (3/16"–1/2") — 21 sockets in total, all on a 1/4" square drive with chrome vanadium steel construction and knurled grip rings.

Why does the B40AMN/B include three wobble extension bars rather than two? Having all three lengths — 50mm, 100mm, and 150mm — ensures the correct extension is always available without resorting to stacking two bars together for medium-depth access, which reduces rigidity and torque feel. The 50mm bar handles standard shallow applications, the 100mm covers mid-depth engine bay and interior work, and the 150mm reaches deeply recessed fasteners, bulkhead fixings, and components buried within door cavities or instrument panels. Many comparable sets omit the 100mm middle length, leaving a gap the B40AMN/B avoids entirely.

What is the difference between the Draper Expert B40AMN/B and the B75AMN/SG? The B75AMN/SG is the flagship 75-piece set, adding metric and imperial deep sockets, a flexible extension bar, flexible handle, a much broader TX-STAR® Torx range (T7–T30 including T27), metric and imperial hex bits, Pozidriv and Phillips No.3 bits, and additional plain slot sizes. The B40AMN/B is a more focused set prioritising the most commonly used socket sizes and fastener profiles in a more compact, cost-effective package — ideal for professionals who need dual-standard 1/4" drive capability without the full depth of coverage the B75AMN/SG provides.

What vehicles and applications is the B40AMN/B best suited to? The B40AMN/B is well suited to modern European vehicle interior and trim work (where Pozidriv, Phillips, and T15–T25 Torx fasteners predominate), classic and American vehicle maintenance requiring imperial AF sockets, motorcycle servicing, marine engine work, domestic appliance repair, and any general workshop application mixing metric and imperial fastener standards. The three-bar wobble extension set and sliding T-bar make it particularly capable for work in confined spaces across all these applications.

What does the knurled ring on each socket do? The knurled ring creates a textured grip surface around the outside of each socket body, allowing the socket to be picked up, positioned, and seated firmly with one hand — even in greasy, oily, or gloved conditions. It is particularly useful when working overhead, inside door cavities, or in any confined space where two-handed socket placement isn't practical.

Why are both Pozidriv and Phillips bits included in the B40AMN/B? Phillips and Pozidriv fasteners look nearly identical but have different internal geometries — Pozidriv has additional radial grooves between the cross slots that create a tighter fit and virtually eliminate cam-out. Using a Phillips bit in a Pozidriv fastener risks slipping and damaging the recess. PZ fasteners are standard across VW Group, BMW, Mercedes-Benz, and Stellantis vehicles, as well as European domestic appliances and construction fixings. Including both profiles ensures the correct driver is always available without the risk of cross-drive damage.

What TX-STAR® Torx sizes are included and what are they used for? The B40AMN/B includes T15, T20, and T25 TX-STAR® Torx bits — the three sizes most commonly encountered on automotive interior trim panels, dashboard fixings, door cards, seat runners, and centre console components across modern European and Asian vehicles. For trim-focused automotive work, these three sizes cover the overwhelming majority of Torx fasteners encountered without the need for a broader range.