Included are four(4) different sizes of connectors, 0.125(3.175mm), 0.25(6.35mm), 0.375(9.525mm), 0.5(12.7mm) a set screw can be drilled and tapped in for a more secure fit, optomized for 3D Printing this needs no supports just print standing up. There are .OBJ and .AMF Files included for each size.
For different Connection sizes or any adjustments you would need send me a message and i will add a file for it.