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.

Dynabrade 14010 Dynafile Abrasive Belt Tool Versatility Kit
Dynabrade 14000 Dynafile Abrasive Belt Tool
Norton 66261014793 - 3" Medium Grade Aluminum Oxide Bear-Tex Speed-Lok High Strength Maroon TR Non-Woven Abrasive Disc, 80 Each
Dynabrade 52474 Vane Set (4pk)
Dynabrade 57113 Rotor/Vane Set
3M 01328, PSA Cloth Disc 348D, P180 X-weight, 3 in x NH, Die 300V, 7000045068
Standard Abrasives 710870, Cartridge Roll Mandrel, 1/8 in x 1/2 in x 1/4 in x 1-1/4 in x 2-1/4 in CM-7, 7000121794
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
Dynabrade 14360 Pneumatic Pipe Belt Finisher
Standard Abrasives 32953, PSA A/O Disc, 711880, 2 in x NH, 60, 7010310798
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC) 
