Proto:48 Gage Blocks with 13/32" slot

Proto:48 Gage Blocks - important in remounting new wheels on axles. Machined from 01 tool steel, hardened, annealed and then precision ground to 1.107" +/- .001" allowing for .001" springback.  Completed gaging optimum would be 1.108". Prototype tolerances x 48 are from 1.106" to 1.149". Designed by Steve Grabowski.