This flanged steel spacer is 1” long, with a 5/8” hole that slides over the Baldor ½ and 3/4hp grinder shafts and fits between the disc and the motor housing. This spacer replaces the current Aluminum Heel Finish Disc Spacer. These spacers can be used with the new FootPro Double Sided Discs or the FootPro Aluminum Heel Finish Disc.