2" Flexible Diamond PSA Sanding Disc from 3M. Made in USA. 10,000 RPM Max Speed. IMPORTANT NOTES: 1. For Use in Handpieces: Use with A-M338 and M33 Mandrels when mounting discs directly into Flex Shaft Handpieces. 2. For Use on BL Bench Lathe: Use with A-M33 Mandrel and A-CHA-5 Collet Holder when mounting discs for use on Bench Lathe. 3. For Use on Angle Grinder Attachment: Use with A-10041 PSA Velcro Disc and A-69222 Disc Mandrel when mounting discs onto Angle Grinder.