General description A 12mm flexi-head crows foot wrench designed for use with a 3/8" square drive ratchet. The flexible head allows for easy access in awkward or hard-to-reach areas, while the open end is suitable for use on flare nuts or sensors. Ideal for removing brake, fuel, and hydraulic lines. Technical specifications Size: 12mm Drive: 3/8" square Extension bar length: 43mm (from pivot point) Profile: Bi-Hex (12pt) Material: Chrome vanadium Coating: Manganese phosphate for corrosion resistance Other information Part of a range of 3/8"D flexible crows foot wrenches from 10mm to 22mm (Part Nos. 8425 - 8437).