Draper Expert Metric Socket Set, 3/8" Sq. Dr. (42 Piece)

The Draper Expert D42MN/SG 42-Piece Metric Socket Set is a professional-grade toolkit engineered for mechanics, vehicle technicians, and serious workshop users who need a wider range of socket sizes and greater depth of reach than a standard set provides. Combining 19 standard sockets, 15 deep sockets, and 3 spark plug sockets — all on a 3/8" square drive — this is one of the most comprehensively specified sets in its class.

Every socket in the D42MN/SG range is precision-manufactured from chrome vanadium steel, then hardened, tempered, and finished to a distinctive micro satin chrome for a refined, professional look and superior corrosion resistance. The knurled grip ring on each socket gives you confident handling when reaching into tight spaces, making it easy to locate and position sockets one-handed — a small but significant feature that separates the Expert range from budget alternatives.

The six-point socket geometry ensures maximum surface contact with fastener flats, dramatically reducing the risk of rounding off nuts and bolts — particularly important when working on older, corroded, or over-tightened fixings.

The 15 deep sockets (6–19mm and 22mm) are a standout feature of this set, allowing you to reach recessed fasteners, long studs, and nuts on threaded rod that standard sockets simply can't access. Paired with the two wobble extension bars (75mm and 150mm), you gain exceptional reach and off-axis flexibility for awkward engine bay and chassis applications.

The included 72-tooth reversible ratchet features a soft-grip handle and quick-release button, delivering a fine 5° swing arc that lets you work efficiently in confined spaces with minimal handle movement. A 1/2"(F) to 3/8"(M) adaptor further extends versatility, allowing you to pair this drive with larger 1/2" accessories or sockets when heavier torque is needed.

Everything packs away securely in a tough blow-moulded plastic storage case with a soft-grip handle — keeping all 42 pieces organised, protected, and ready for transport to site or between bays.

Manufactured and tested in accordance with DIN3122 and ISO3315 specifications, the D42MN/SG carries the quality assurance of Draper's Expert range, which is designed for professionals who rely on their tools day in, day out.

Key Features

• 42-piece professional metric socket set with 3/8" square drive
• 19 standard metric sockets: 6–24mm
• 15 deep metric sockets: 6–19mm and 22mm — ideal for recessed fasteners and long studs
• 3 spark plug sockets: 10mm, 12mm, 14mm
• 72-tooth reversible ratchet with soft-grip handle and quick-release button
• Chrome vanadium steel — hardened, tempered and micro satin chrome plated
• Knurled grip ring on every socket for secure one-handed positioning
• Six-point socket design minimises fastener rounding
• 75mm and 150mm wobble extension bars for reach and off-axis flexibility
• Universal joint for working at awkward angles
• 1/2"(F) to 3/8"(M) adaptor for use with larger drive accessories
• Compliant with DIN3122 and ISO3315 specifications
• Stored in a tough plastic storage case with soft-grip handle

What sockets are included in the Draper Expert D42MN/SG set? The D42MN/SG includes 19 standard metric sockets (6–24mm), 15 deep metric sockets (6–19mm and 22mm), and 3 spark plug sockets (10, 12, 14mm), all operating on a 3/8" square drive.

What is the difference between the standard and deep sockets in the D42MN/SG? The standard sockets cover everyday fastening tasks, while the 15 deep sockets allow access to recessed bolts, long studs, and nuts that sit too far down for a standard socket to engage. The deep socket range covers 6–19mm and 22mm.

What are wobble extension bars and why are they useful? Wobble extension bars have a slight angular flexibility at the drive end, allowing you to work at an angle of up to around 15° off-axis. This is invaluable in engine bays and chassis work where a straight-line approach to a fastener isn't always possible. The D42MN/SG includes wobble bars in both 75mm and 150mm lengths.

What does the knurled ring on each socket do? The knurled ring provides a textured gripping surface around the body of each socket, making it easier to pick up, position, and seat sockets with one hand — particularly useful when working in confined spaces or overhead.

Is the Draper Expert D42MN/SG suitable for professional use? Yes. The D42MN/SG is part of Draper's Expert range, which is designed and tested for professional and trade use. Chrome vanadium steel construction, DIN3122 and ISO3315 compliance, and the inclusion of deep sockets and wobble extensions make it a dependable choice for vehicle technicians and workshop professionals.

What is the 1/2" to 3/8" adaptor used for? The 1/2"(F) to 3/8"(M) adaptor allows you to use the set's 3/8" drive accessories with a larger 1/2" drive ratchet or breaker bar, giving you access to higher torque output when removing tight or corroded fixings.