Flexipads 17096 Dual action orbital sander pad, 150 mm (6in) face to suit dust extraction machines. Medium density with 12mm foam layer. Perfect for Abranet and other 51 hole discs. Hole: 51 HoleType: ABRANETSize: 150 mm (6in)Thread: 5/16 UNFMax RPM: 10000 Made in Great Britain.