3M 5″ HOOKIT BACKUP PAD PN# 05775 – This pad is specifically made to use with the 3M Hookit discs. The pad face securely holds the discs yet allows for easy change and reattachment of discs. The pad is lightweight, shock resistant and well-balanced. The tough durable plastic hub and conformable foam body are designed for a maximum operating speed of 7000 RPM. Fits random orbital sanders with 5/16-24 internal thread. For use with 5″ Hookit discs. Product is sold by the each.