Draper Expert Metric Crow Foot Spanner Set on a Metal Rail, 3/8" Sq. Dr. (8 Piece)

Reach fasteners in the tightest spaces without sacrificing torque or control using the Draper Expert D-CRF8 Metric Crow Foot Spanner Set. Covering eight of the most commonly used metric sizes across automotive, mechanical, and engineering applications, this 3/8" square drive set is an essential addition to any professional toolbox where standard spanners and sockets simply cannot get in.

Crow foot spanners attach directly to a 3/8" square drive ratchet, torque wrench, or extension bar — combining the open-ended grip of a spanner with the versatility of a socket drive system. This makes them indispensable for working on fasteners in confined locations where there is insufficient clearance to fit a standard ring or socket, such as brake line fittings, fuel line unions, injector connections, awkward engine bay bolts, and transmission fasteners. Critically, because crow feet can be used with a calibrated torque wrench, they allow accurate torque settings to be applied in locations where a torque wrench could not otherwise reach — an important advantage for safety-critical fasteners.

Each crow foot in the D-CRF8 set is manufactured from good quality carbon steel, hardened and tempered for strength and durability under professional workshop use. The black phosphate finish provides corrosion resistance and reduces glare in working conditions. All eight pieces are supplied on a metal storage rail that keeps the set organised, prevents individual pieces from being lost in a cluttered toolbox, and makes it easy to identify the size you need at a glance.

Contents:

10mm, 12mm, 13mm, 14mm, 15mm, 17mm, 19mm, 22mm

Key Features:

• 3/8" square drive for use with standard ratchets, torque wrenches, and extension bars
• Eight metric sizes covering the most commonly used fastener dimensions
• Ideal for accessing fasteners in confined spaces where standard spanners and sockets cannot reach
• Compatible with torque wrenches for accurate torque application in restricted locations
• Manufactured from hardened and tempered carbon steel for strength and durability
• Black phosphate finish for corrosion resistance
• Supplied on metal storage rail for organised, space-efficient storage

Specifications:

Why Every Professional Needs Crow Foot Spanners

Standard sockets require clearance directly above the fastener to fit over the head. Standard spanners require swing room to rotate. In many real-world working situations — particularly in automotive and engineering environments — neither condition is met. Brake pipe unions on bulkheads, fuel rail fittings, injector return line banjo bolts, gearbox selector linkage nuts, and power steering line fittings are all classic examples of fasteners that sit in locations too confined for conventional tooling.

Crow foot spanners solve this problem by approaching the fastener from the side, with the drive connection sitting at a 90-degree offset. Mounted on an extension bar or a flex-head ratchet, they can reach into recesses, around obstructions, and into engine bay locations that would otherwise require component removal just to access the fastener — saving significant time on jobs where accessibility is the main challenge.

Use with a Torque Wrench for Accurate Results

One of the most important advantages of crow foot spanners over fixed open-ended tools is their compatibility with calibrated torque wrenches. Because they attach to a standard 3/8" drive, any 3/8" torque wrench can be used to apply a precise torque setting through the crow foot — essential for safety-critical fasteners such as brake line unions, suspension components, and fuel system fittings where both under-torquing and over-torquing carry real risks. When using a crow foot at a 90-degree angle to the torque wrench, no correction factor is needed, making it a straightforward way to achieve accurate torque in otherwise inaccessible locations.

Who Is the Draper Expert D-CRF8 For?

The D-CRF8 is designed for automotive technicians, mechanical engineers, and professional tradespeople who regularly encounter fasteners in confined or obstructed locations. It is particularly valuable for brake system work, fuel system servicing, engine bay maintenance on modern tightly packaged vehicles, and any application where a standard socket or spanner cannot achieve access. The eight sizes covered — 10mm through to 22mm — span the range most commonly encountered across European and Asian vehicle platforms and general engineering applications.

FAQ Section:

What drive size are the Draper D-CRF8 crow foot spanners? The D-CRF8 set uses a 3/8" square drive, compatible with standard 3/8" ratchets, torque wrenches, extensions, and adaptors.

What sizes are included in the D-CRF8 set? The set contains eight crow foot spanners in the following metric sizes: 10, 12, 13, 14, 15, 17, 19, and 22mm.

Can crow foot spanners be used with a torque wrench? Yes. Because the D-CRF8 crow feet use a standard 3/8" square drive, they can be used directly with any 3/8" drive torque wrench — allowing accurate torque settings to be applied to fasteners in confined locations where a torque wrench socket could not otherwise fit. When the crow foot is positioned at 90 degrees to the torque wrench, no correction factor is required.

What is a crow foot spanner used for? Crow foot spanners are open-ended spanners with a square drive connection rather than a handle. They attach to a ratchet or extension bar and are used to access fasteners in confined spaces — such as brake line fittings, fuel unions, and awkward engine bay bolts — where standard sockets and spanners cannot fit due to space constraints.

What material are the D-CRF8 crow foot spanners made from? Each crow foot in the D-CRF8 set is manufactured from carbon steel, hardened and tempered for strength and durability. The black phosphate finish provides corrosion resistance and a professional appearance.

How are the crow foot spanners stored? The D-CRF8 set is supplied on a metal storage rail that keeps all eight pieces organised and easy to identify by size, preventing loss in a toolbox drawer or roll cabinet.