Mounting Bracket - TOOGOO(R) 37mm DC Geared Motor Mounting Bracket Holder + 6mm Hex Coupling Black+Gold Product Name : DC Geared Motor Bracket with Hex Coupler Fit Model for : 37mm Geared Motor Widely used in Micro DC Gear Motor 37mm series. DC geared motor to robot smart car wheels Hex coupler. Compatible with the motor shaft size 6mm diameter. Screws are not included.