Widely Fitment -- Adjustable C pin spanner hook wrench tool set covers most commonly needed sizes from 3/4" to 6-7/10" (19-170 mm). Designed for easy coilover, lock nut, and bearing adjustment, widely used in repairing cars, heating systems or pipe fittings. Package Includes -- Coilover hook wrench set includes 4 wrenches of 3/4" to 2" (19mm to 51mm), 1-1/4" to 3" (32mm to 76mm), 2" to 4-3/4" (51mm to 121mm), and 4-1/2" to 6-7/10" (115mm to 170mm). Also comes with 4 interchangeable adapters and 1 hex key for exchanging. Square and Round Changeable Pins -- Adjustable pin wrench comes with 2 types of pins for a wide range of diameters to grip both square and round holes on collars, bearings and other machine tool parts. Just use the included hex key to easily tighten the pin onto the sturdy handle. User-friendly Operation -- Convenient handle not only provides the extra leverage and more torque to handle tough jobs, but also works in a variety of places that ordinary tools can't reach. Solid pin hook ensures a firm grip and can easily turn the most stubborn lock nuts and pipe fittings. High Performance -- C-shaped spanner wrench adopts a movable head design with adjustable opening size, which is perfect for common shock suspensions and coilovers. Each handle is clearly marked for easy identification. Excellent Quality -- Constructed from premium chrome vanadium steel with chrome-plated surface. Hardened construction for high strength and impact resistance, anti-corrosion, anti-rust, sturdy and durable. 9pc Adjustable Pin Spanner Wrench Tool Set, Spanner Nut Wrench Tools with Changeable Heads for Pipes Heating Cars, Coilover Hook Wrenches for Suspension System From 3/4" to 6-7/10"