Description: Stainless Steel TFL 5.0mm To 4.76mm Flex Collet Coupler Shaft For RC Boat   Specifications: Compatibility: 4.76mm (3\/16 Inch)  shaft and 5mm motor shaft Material: Stainless steel Length: 31mm Inner Diameter (connect motor shaft): 5.0mm Inner Diameter (connect flex shaft): 4.76mm   Features: This stainless steel flex coulper \/ collet with one grub screw fits for 5mm motor shaft and 4.76mm (3\/16!#!amp!*!quot;) flex cable for rc boat. It's for round end cable.   Package Included: 1PC x Flex collet coupler   More Details: