VersaHex Adapters allows you to change any 1/2" Hex Bore product to either a 3/8" hex, 1/4" square or 6mm D Shaft bore. This means that you can run a GT2 pulley on a 3/8" Hex Shaft, a VEXpro Hub Sprocket on a VEX EDR High Strength Shaft or a VEXpro 20 DP gear on a 6mm D Shaft. Each type of VersaHex Adapters come in 1/8" and 1/4" lengths.