4 5 Aluminum Backer Pad (18 PCS) Floor GRINDER Polisher sander backing Pad

This 19 Pieces of aluminum backer’s arbor is 5/8-11 Female Thread. This package carries (a)-(b). (a) 9 Pieces of 4″ / 100mm (5/8″-11 Female Thread arbor) Aluminum Backer / Pad holder for diamond polishing pad. (b) 9 Pieces of 5″ / 125mm (5/8″-11 Female Thread arbor) Aluminum Backer / Pad holder for diamond polishing pad.