35mm . Extremely fast delivery for aliexpress standards . Couldn't wait to test and guess what ? this is the best I 've ever bought on AE. Had to go through 1cm plate and it went smoothly ... on a belt driven drill . Why bother changing drills up to 35 mm while this goes in one run. THANK YOU .THANK YOU .THANK YOU .
it"s dont feet to the drill u need to buy adptor '