Draper Metric Socket and Ratchet Set, 3/8" Sq. Dr. (12 Piece)

The Draper DD12M/PR Metric Socket and Ratchet Set is a clean, no-nonsense 3/8" drive kit covering the ten metric socket sizes most frequently called upon in automotive, mechanical, and general workshop applications. Compact in form but practical in scope, it is an ideal choice as a standalone everyday set or as a targeted addition to an existing toolkit where 3/8" drive coverage is needed.

The ten sockets run from 10mm to 19mm — the range that accounts for the overwhelming majority of nuts, bolts, and fasteners encountered in passenger vehicle servicing, light engineering, plumbing, and general maintenance. Each socket is manufactured from chrome vanadium steel, hardened and tempered for lasting strength, and finished with a satin chrome plating that resists corrosion in workshop and outdoor conditions alike.

The included 72-tooth reversible ratchet produces a fine 5° swing arc, making it well suited to working in confined spaces where only a short ratchet stroke is available between obstructions. The quick-release button allows fast, one-handed socket changes, and the soft-grip handle provides a comfortable, secure hold during both high-speed run-down and final torque work. The 100mm extension bar adds useful reach for recessed fasteners and bolts set back within engine bays, chassis members, or bodywork.

As with the 1/4" BD12M/PR, this set is supplied on a socket rack rather than in a bulky moulded case. The rack format keeps all twelve pieces visible and instantly accessible, making it straightforward to store in a tool chest drawer, hang on a workshop wall, or carry in a bag without the weight and bulk of a full case.

Manufactured and tested in accordance with DIN3122 and ISO3315 specifications, the DD12M/PR is built to the consistent quality standard of the Draper range and is equally appropriate for professional mechanics looking for a compact secondary set and home users tackling their own vehicle servicing and maintenance.

Key Features

• 12-piece 3/8" drive set — focused, portable coverage of the most-used metric socket sizes
• 10 metric sockets — 10mm to 19mm covering everyday automotive and mechanical fastener sizes
• Chrome vanadium steel — hardened, tempered, and satin chrome plated for strength and corrosion resistance
• 72-tooth reversible ratchet — 5° swing arc with quick-release button and soft-grip handle
• 100mm extension bar — for recessed and obstructed fastener access
• Socket rack storage — compact, case-free format keeps all pieces visible and accessible
• DIN3122 & ISO3315 compliant — manufactured and tested to international professional standards
• Ideal for automotive servicing and general workshop use — 3/8" drive suits the mid-torque range of everyday mechanical tasks

What's in the Box

Supplied on a socket rack for storage and transportation.

What drive size is this socket set? This set uses a 3/8" square drive — the most widely used drive size in automotive and general mechanical work. It sits between the precision of 1/4" drive and the high-torque capability of 1/2" drive, making it the most versatile choice for everyday fastener work from engine servicing to suspension components.

What socket sizes are included? The set includes ten sockets covering 10, 11, 12, 13, 14, 15, 16, 17, 18, and 19mm — the core metric range for automotive and mechanical applications. For smaller fasteners below 10mm, Draper's 1/4" drive socket sets such as the BD12M/PR provide a complementary range.

How is this set stored? The DD12M/PR is supplied on a socket rack rather than in a moulded plastic case, keeping all twelve pieces clearly visible and immediately to hand. The rack is well suited to tool chest drawers, workshop shelving, or carrying in a tool bag.

How does this set differ from the 1/4" drive BD12M/PR? The key differences are drive size and socket range. The DD12M/PR uses a 3/8" square drive and covers 10–19mm — suited to mid-range automotive and mechanical fasteners. The BD12M/PR uses a 1/4" drive and covers 4–13mm — suited to smaller, more precise fastener work. The two sets are designed to complement each other, and together provide continuous metric coverage from 4mm to 19mm.

What is the extension bar length on this set? A single 100mm extension bar is included, providing a useful increase in reach for fasteners set back within engine bays, behind trim panels, or inside chassis sections, while maintaining a firm and rigid drive connection.

Is this set suitable for professional use? Yes. The DD12M/PR is manufactured from chrome vanadium steel, hardened and tempered to professional tolerances, and tested in accordance with DIN3122 and ISO3315 specifications. It is appropriate both as a compact secondary set for professional mechanics and as a primary set for confident home users.

What is the tooth count on the ratchet, and why does it matter? The ratchet has 72 teeth, producing a 5° arc of movement between engagements. The higher the tooth count, the smaller the movement needed to advance the ratchet — which is particularly important when working in tight spaces where only a short stroke is available between ratchet movements.