2Pack Vgoohobby CNC Stainless Steel RC Flex Collet Coupler Flexible Coupling Motor Shaft Locker for DIY RC Boat Submarine (5mm to 4mm) 5mm to 4mm industrial2 The barbecue tool set includes

The barbecue tool set includes a sportula

Light weight but heavy duty engineering plastics

Stenciling instructions are included with every order

its important to protect your hands against fluids

widely used among electronic experiments and point-to-point DIY soldering projects

2Pack Vgoohobby CNC Stainless Steel RC Flex Collet Coupler Flexible Coupling Motor Shaft Locker for DIY RC Boat Submarine (5mm to 4mm) 5mm to 4mm industrial2 The barbecue tool set includes2Pack Vgoohobby CNC Stainless Steel RC Flex Collet Coupler Flexible Coupling Motor Shaft Locker for DIY RC Boat Submarine (5mm to 4mm) Compatible with DIY RC electric boat,used to connect the motor with the drive shaft. Made of stainless steel,durable to use. Well made,a good replacement for your old or broken one. A variety of sizes available to be chosen. Material: Stainless Steel Connect to Flexible Shaft : 4mm Connect to Motor Shaft: 3. 17mm 4mm