Description: 【Package】Grinding wheel shaft are included, including 5mm/6mm/8mm/10mm/12mm/14mm/16(Optional), Measure your motor rod before purchasing. 【Application】Polishing wheel adapter can be connected to the polishing wheel with an inner diameter of more than 10mm(as you choose), and it can be connected to the grinding wheel, fiber wheel, wheel, and cloth wheel. 【Material】Motor spindle adapter is made of steel, and two wide pressure plates are fixed on both sides of the polishing wheel, which are tightened screws. 【Function】The Motor Arbor Adapter kits is used to convert the motor spindle extension shaft to a threaded shaft polisher, or the grinder extension shaft to a threaded shaft polisher. 【Advantages】This Polishing Connecting Rod can turn your motor into a grinder and polisher. Specification: Material: Steel Size Chart: Optional Inner hole:0.5cm/0.20inch Inner hole:0.6cm/0.24inch Inner hole:0.8cm/0.31inch Inner hole:1cm/0.39inch Inner hole:1.2cm/0.47inch Inner hole:1.4cm/0.55inch Inner hole:1.6cm/0.63inch Package Includes: 1 Polishing Connecting Rod(6 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.