Eraser Wheel has serrations for improved cooling effect air flow.
Dynabrade surface grinding wheel has a diameter of 4 in. The quick change attachment allows for easy mounting to the tool or pad. In addition to the other aspects of these parts, another important component of these is the thickness. This Dynabrade part is 1 1/4 in thick. All abrasive products that rotate or spin, such as the ones in this category, have a maximum speed at which you can run them. This Dynabrade surface grinding wheel can be run at a maximum speed of 4000 RPMs.

Insize IST-04TT28, DIGITAL TORQUE TESTER, 24.8~247.8in.lb/2.06~20.65ft.lb, 6940561972863
Dynabrade 90405 1/8" W x 24" L 60 Grit A/O DynaCut Belt, 50/pack
Dynabrade 90370 3/4" W x 34" L 120 Grit A/O DynaCut Belt, 50/pack
Dynabrade 78538 3/4"Dia. 2-Set, 3-48 Female Center Thread, 80 Grit, Dynacut A/O Overlap Slotted Disc, 100/pack
Dynabrade 79054 1/8" W x 24" L 80 Grit A/Z DynaCut Belt, 50/pack 
