Review on 3/4-inch Thick Reducing for Various Applications by Danierl Temple

I bought these for a 6" bench grinder with a 1/2" arbor. Brief history: Around many large and small, without work. Long story: The 1/2" to 5/8" bushing wasn't slipping on the shaft so I checked the ID of the bushing (.475") and then the OD of the shaft (.500"). If you look at the photos, you will find that the ID and OD of all three parts are not compatible. Without slip fit tolerances, the dimensions are as follows (ID-OD): 1/2" to 5/8" is .475" to .631". 5/8 to 3/4 inch is 0.592 to 0.783 inch. 3/4 to 1 inch is 0.783 to 0.983 inches. The three parts don't even come close. They will be returned for a refund. It's a bit ridiculous that they're so far from tolerant, but you know, that's the quality you get cheap, quick and easy at Revain. I knew better and did it anyway. The little sea green thing is a case I 3D printed in 10 minutes and it works perfectly.