This is a 100mm cap-style oil filter wrench designed to remove and install spin-on oil filter canisters on cars, light commercial vehicles and motorcycles where a large-diameter cap is required. The tool fits over the filter body and engages the fluted cap profile to allow controlled application of torque using a square-drive ratchet or breaker bar, making filter changes quicker and reducing the risk of crushing polymer or thin-walled metal cans.

The wrench is manufactured from chrome vanadium (Cr-V) steel that has been heat treated for strength and durability and finished with a bright chrome plating to resist corrosion and simplify cleaning after use. The cap incorporates a multi-flute internal profile that offers positive engagement with the filter end face; the most common drive interface is a 3/8in (9.5mm) square recess compatible with standard 3/8in ratchets and extensions. As a hand tool intended for workshop use it is produced in accordance with recognised DIN/ISO/BS hand-tool dimensions and quality controls for socket-type implements, ensuring compatibility with standard drive tools and accessories.

Typical applications include routine vehicle servicing, mobile mechanics, agricultural machinery maintenance and fleet workshops where repeated filter changes are carried out. It is particularly useful where access is limited and a secure grip on the filter body is needed to prevent slippage or deformation. The cap profile reduces the chance of round-off compared with adjustable strap or chain wrenches and provides a safer, more repeatable method of applying torque.

Key benefits are good corrosion resistance from the chrome finish, robust torsional strength from the Cr-V construction and broad compatibility with industry-standard 3/8in drive tools. The precise internal flute profile improves engagement and reduces damage to replacement filters, helping to maintain sealing surfaces and oil system integrity.

Duchy Fasteners stocks this 100mm cap oil filter wrench individually and in workshop packs where available; please contact us for exact size availability, pack quantities and bulk pricing. Product code DR10784 identifies this Draper Tools Group D item for quick ordering.