This mini punch set includes six of the most used sizes of tubes to punch round holes for snaps, rivets, belts, eyelets etc. Size of tube diameters: 5/64", 3/32", 1/8", 9/64", 5/32", 11/64". Tempered, chrome plated steel handle. These interchangeable steel tubes are an affordable alternative to buying individual drive punches for each size round hole when doing leather craft work.