A-D6 1-1⁄4″ diameter – 1/16″ Arbor Hole
Use A-M13 or A-M19 mandrel in Handpiece
A-D8 1-1⁄2″ diameter – 1/8″ Arbor Hole
Use A-M14 mandrel in Handpiece
A-D9 2″ diameter – 1/8″ Arbor Hole
Use A-M14 mandrel in Handpiece

All are .050″ thick  with a 60 grit with 40,000 RPM – Max Speed.

Fiberglass Reinforced Cut Off Wheels A-D6, A-D8, and A-D9 are used to cut-off, groove, and trim metal, wood, and ceramics. Recommended for use with Foredom Mandrels A-M15 and A-M19 (A-D6) and A-M14 (A-D8 and A-D9). 

Made in USA. 40,000 RPM Max Speed.