Mounted Midget Felt Buffs & Bobs All have 3/32" shanks. Sold by dozen. 17-115 is a wheel buff mounted on an arbor 1" diameter x 1/8" thick. 17-121 is a cylinder felt buff 3/8" x 5/8" mounted on an arbor . 17-124 is a pointed felt buff 1/4" x 5/8" mounted on an arbor.