Indispensable when forming small items. Each tool has a 5mm dia. shank that fits into the H-2 Holder (see related products below) and into which the tool can be mounted either vertically or horizontally. The wide selection of wheel sizes make it easy to dome flat rings or short lengths of tubing into domed shapes. Every Fretz Insert Stake is fashioned from 420 stainless steel and polished to perfection.