【Premium Bushing Set】Product specification: 5/8"-3/8", 5/8"-10mm, 5/8"-1/2", 20mm-10mm, 20mm-1/2", 20mm-5/8", 7/8"-5/8", 1"-5/8", 30mm-5/8", 2 pcs per size. 【Universal Size Set】18 standard bushing rings in 9 sizes, making this saw blade bushing set super handy for general circular saw blade & diamond blade. 【High-Precision Bushing Set】 Almost error free copper bushing set fits well for saw blade arbor, compatible with circular saw, angle grinder & other power tools. 【Portable Pocket Design】Hangable & pocketable storage design, a great toolkit for tool users. 【Reminder of Installation】Please make sure saw blade thickness exceeds bushing thickness before installation.