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Remind:

This 5 Inch aluminum and rubber backer's arbor is 5/8"-11 Female Thread.

NOT M14 Thread.

This package carries (a)-(b):

(a)  1 Piece of 5" / 125mm (5/8"-11 Thread arbor) Aluminum Backer / Pad holder for diamond polishing pad.

(b)  1 Piece of 5" / 125mm (5/8"-11 Thread arbor) Rubber Backer / Pad holder for diamond polishing pad.

Important Remind:

Rubber Backer's max velocity / capacity is 5000 RPM, please don't use it with high speed grinder / polisher.