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

The Draper Expert B40AMN/SG 40-Piece Combined MM/AF Socket Set delivers the same dual-standard socket coverage and comprehensive drive accessory package as the Expert B40AMN/B — but with two key refinements that make it the preferred choice for professional technicians who prioritise finish quality and extended comfort during intensive use. The micro satin chrome finish on every socket and the soft-grip ratchet handle distinguish the B40AMN/SG as a step up in tactile quality and working refinement within the Expert range's 40-piece dual-standard lineup.

The socket foundation provides 12 standard six-point metric sockets (4–13mm, including 4.5mm and 5.5mm) and 9 imperial AF sockets (3/16"–1/2") — 21 sockets covering the full spread of small metric and imperial fastener sizes encountered across modern European vehicles, American classics, motorcycles, marine engines, and imported machinery. The dual-standard coverage means the B40AMN/SG handles the complete range of fastener standards without requiring a supplementary set, making it the logical choice for technicians whose work regularly crosses between metric and imperial applications.

Every socket is precision-manufactured from chrome vanadium steel, hardened and tempered, then finished to Draper's Expert-grade micro satin chrome — a refined, low-glare finish that reduces reflective eye fatigue in brightly lit workshops, resists fingerprinting more effectively than high-polish alternatives, and provides excellent long-term corrosion resistance. The knurled ring on each socket ensures confident one-handed positioning in oily, greasy, or gloved conditions, and the six-point geometry maximises surface contact with fastener flats — minimising rounding risk on the compact fixings that characterise 1/4" drive work.

The soft-grip ratchet handle is the second key distinction of the B40AMN/SG over the polished-finish B40AMN/B. The cushioned, ergonomic grip material absorbs vibration and reduces hand fatigue during prolonged ratcheting — a meaningful practical advantage for technicians working through repetitive fastening tasks or extended workshop sessions. The 72-tooth mechanism delivers the same fine 5° swing arc and quick-release button for efficient operation in confined spaces.

The drive accessory package matches the B40AMN/B specification in full — six accessories providing thorough control over reach, angle, and torque:

• 72-tooth reversible soft-grip ratchet with quick-release button — 5° swing arc
• Spinner handle for rapid, low-fatigue fastener running
• Three wobble extension bars at 50mm, 100mm, and 150mm — the complete trio for shallow, mid-depth, and deep access with off-axis flexibility at every length
• Sliding T-bar — for high-leverage breakaway or rapid free-spinning
• Universal joint — for indirect-angle fastener access
• 1/4" Sq. Dr. to 1/4" hex bit adaptor — integrating the bit selection directly with the ratchet and extension bars

As with the B40AMN/B, the provision of all three wobble extension bar lengths is a strong practical advantage — eliminating the need to stack bars for medium-depth access and ensuring a stable, one-bar connection at every required depth. The wobble feature at each length adds off-axis flexibility for fasteners that can't be approached directly, removing the need to swap to a universal joint for minor angular deviations.

The 11-piece 25mm insert bit selection covers four drive profiles across the most commonly encountered fastener types in automotive and domestic applications:

4 plain slot bits: 3, 4, 5.5, 6.5mm — four sizes covering the full range from 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 across automotive and general fastening work.

2 Pozidriv (PZ-Type) bits: No.1, No.2 — essential for European vehicles and domestic appliances where Pozidriv is standard fitment. The PZ profile's tighter geometric engagement prevents the cam-out and fastener damage that results from incorrectly using Phillips drivers on Pozidriv screws — particularly important on VW Group, BMW, Mercedes-Benz, and Stellantis vehicles.

3 TX-STAR® Torx bits: T15, T20, T25 — the three Torx sizes most frequently encountered on automotive interior trim, dashboard fixings, seat runners, door cards, and centre console components across modern European and Asian vehicles.

The complete 40-piece set is housed in a tough blow-moulded plastic storage case with dedicated recesses for every component. As part of Draper's Expert range, the B40AMN/SG is manufactured and tested in general accordance with DIN3122 and ISO3315 specifications — quality verified to the standards demanded by professional daily use.

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 micro satin chrome finish for low-glare professional appearance
• Knurled ring on every socket for secure one-handed grip
• Six-point socket geometry minimises fastener rounding
• 72-tooth reversible ratchet with soft-grip handle for reduced fatigue and quick-release button — 5° swing arc
• Spinner handle for rapid fastener running
• Three wobble extension bars: 50mm, 100mm, 150mm — complete trio for all access depths
• 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 x 25mm 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 is the difference between the Draper Expert B40AMN/SG and the B40AMN/B? Both sets are identical in socket count, drive accessories, and screwdriver bit selection — 21 sockets, three wobble extension bars, sliding T-bar, spinner handle, and 11 insert bits. The two key differences are the socket finish and the ratchet handle. The B40AMN/SG features a micro satin chrome finish on all sockets — a low-glare, refined finish preferred in bright workshop environments — and a soft-grip ratchet handle that absorbs vibration and reduces hand fatigue during extended use. The B40AMN/B features a high-polished chrome finish and a standard hard handle. The B40AMN/SG is the better choice for intensive professional use; the B40AMN/B suits those who prefer the traditional polished chrome appearance.

What is a micro satin chrome finish and why is it preferred by some professionals? Micro satin chrome is a fine, low-lustre surface finish applied to chrome vanadium steel tools after hardening and tempering. Unlike high-polish chrome, it produces minimal glare under workshop lighting — reducing reflective eye strain during extended use. It also fingerprints less readily and maintains a cleaner appearance in day-to-day professional use. The micro satin finish is the signature surface treatment of Draper's Expert range, distinguishing it visually and practically from the standard product line.

What sockets are included in the Draper Expert B40AMN/SG? The B40AMN/SG 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, micro satin chrome finish, and knurled grip rings.

Why does the B40AMN/SG include three wobble extension bars? The full trio of 50mm, 100mm, and 150mm wobble extension bars ensures the correct reach is always available without stacking two shorter bars together — which reduces rigidity and torque feel. The 50mm bar covers standard shallow applications, the 100mm handles mid-depth engine bay and interior work, and the 150mm reaches deeply recessed fixings inside door cavities, bulkheads, and instrument panels. The wobble feature at each length adds off-axis flexibility, removing the need to substitute a universal joint for moderate angular deviations.

What are the TX-STAR® Torx bit sizes included in the B40AMN/SG? The set includes three TX-STAR® Torx insert bits: T15, T20, and T25 — the sizes most frequently encountered on automotive interior trim panels, door cards, seat components, dashboard fixings, and centre console components across modern European and Asian vehicles.

Why include both Phillips and Pozidriv bits in the B40AMN/SG? Phillips (cross slot) and Pozidriv look nearly identical but are not interchangeable. Pozidriv has additional radial grooves between the cross slots that create a tighter engagement, virtually eliminating the cam-out that occurs when Phillips drivers are used on PZ fasteners. Pozidriv screws are standard across VW Group, BMW, Mercedes-Benz, and Stellantis vehicles, as well as in European domestic appliances and construction fixings. Including both profiles in the B40AMN/SG ensures the correct driver is always available — protecting fastener recesses and reducing the risk of driver slippage.

Is the B40AMN/SG suitable for classic car restoration? Yes. The 9 imperial AF sockets (3/16"–1/2") make the B40AMN/SG well suited to classic and American vehicles where inch-fraction fasteners are standard fitment. Combined with the metric socket range and comprehensive bit selection, it provides the dual-standard coverage needed for restoration work that mixes original imperial fixings with modern metric replacement parts and accessories.