The standard Wearaser has a diameter of 1/4" and is the size and shape of a pencil eraser.
The standard Wearaser has a diameter of 1/4" and is the size and shape of a pencil eraser. This is secured in place with the Wearaser collet with approximately 0.100" exposed for testing. Two other abradant configurations are also offered. The Jumbo Wearaser has a 1/2" diameter (requires the Jumbo Wearaser collet assembly) and the Weardisc™ is a 3/4" diameter by 3/16" thick (requires the Universal Attachment). Due to the larger contact area, both the use of the Jumbo Wearaser and Weardisc should be limited to flat specimens or samples that have little to no change in its shape / contour. Taber recommends applying the Weardisc to the Universal Attachment with pressure sensitive adhesive.