Specification: Diameter 3"/4"/5" , Al base backer,  

80MM M14 = Dia 80mm(3") M14 thread 

100MM M14 = Dia 100mm(4") M14 thread 

125MM M14 = Dia 125mm(5") M14 thread 

80MM 5 8 inch =Dia 80mm(3") 5/8-11 thread 

100MM 5 8 inch =Dia 100mm(4") 5/8-11 thread 

125MM 5 8 inch =Dia 125mm(5") 5/8-11 thread 

Quatity: 1pc

Application:

• 1. Aluminum body provide longer working life and can bear heavy duty working as steel body but lighter weight

• 2. Backer for diamond polishing pads, sanding disc, and grinding discs

• 3.  Backer's max capacity is 4000RPM, Please don't use it with high speed grinder/polisher, recommended speed is 2000RPM