Feature:1. Fitment: Crank socket is suitable for Small Block 5.7L 305 350 400 V8, replacement for Ford, replacement for Oldsmobile engines with 3/16in or 1/4in keyway.2. Function: Crankshaft turning socket tool help to rotate the crankshaft in the proper way, when the balancer is off, safe and reliable.3. Convenient to Use: This crank socket can be used with a 1/2in drive ratchet or breaker bar, you can turn the engine over by hand.4. Rustproof Material: Crank shaft turning socket is made of premium aluminium alloy material, anti rust, wearproof, sturdy and durable.5. Dependable: Exquisite and careful workmanship, crank key turning socket has high performance, can be used for a long time.Specification:Item Type: Crankshaft Turning Socket ToolMaterial: Aluminium AlloyFitment:Fits 1. 610 ID Crankshaft Snout with 3/16in KeywayFits 1. 610 ID crankshaft port with 3/16in keywayReplacement for Ford, replacement for Oldsmobile engines with 3/16in or 1/4in keyway.Fits 1955-2000 V8s plus 1978-2006 200, 262, and 229 V6s.For Small Block 5.7L 305 350 400 V8.Package List:1 xCrankshaft Turning Socket Tool