Features: 1.100% Brand New 3/4 inch to 1 inch Crank Sleeve Adapter with Step Key. 2.Made from cold rolled steel, CNC precision machined and tumbled, high durability. 3.Will fit any motor with a 3/4 inch shaft and 3/16 inch keyway, it is used to convert a crankshaft from 3/4 inch to 1 inch shaft. 4.The adapter is approximately 2.3 inches long and includes the step key needed to go from the 1/4 in key way to the 3/16 key way. 5.Allows you to use your old clutch or pulley on a new engine, you may need to use a small hammer to gently tap it in to place for tightly fit. Specification: Features:_x000D_ _x000D_ 100% Brand New 3/4 inch to 1 inch Crank Sleeve Adapter with Step Key. _x000D_ Made from cold rolled steel, CNC precision machined and tumbled, high durability. _x000D_ Will fit any motor with a 3/4 inch shaft and 3/16 inch keyway, it is used to convert a crankshaft from 3/4 inch to 1 inch shaft. _x000D_ The adapter is approximately 2.3 inches long and includes the step key needed to go from the 1/4 in key way to the 3/16 key way. _x000D_ Allows you to use your old clutch or pulley on a new engine, you may need to use a small hammer to gently tap it in to place for tightly fit. _x000D_ One adapter and keyway included, the wider portion of the key sits in the adapter. _x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Name: 3/4 inch to 1 inch Crank Shaft Sleeve Adapter_x000D_ Material: Steel_x000D_ Color: Silver_x000D_ Adapter Size(L*Dia): 6 * 2.5cm/2.3 * 1in_x000D_ Step Key Length: 4.5cm/1.8in_x000D_ Package Weight: approx.109g_x000D_ _x000D_ Package List:_x000D_ 1 * 3/4 inch to 1 inch Crank Shaft Sleeve Adapter_x000D_ 1 * Step Key PackageList: