C.K Spanners & Wrenches Crowfoot wrench 632002 - CK Tools T4343M 17H, The C.K T4343M 17H is a crowfoot wrench with a spanner size of 17 mm, designed for accessing hard-to-reach fasteners. Manufactured by C.K, this handheld tool is a crucial addition to any mechanic's box of wrenches. It is ideal for plumbing, engine maintenance, and other applications where a regular box wrench or shifter might not fit. C.K T4343M 17H Crowfoot Wrench 17mm Hardened Steel 12 Offset Chrome