Starter Tube Tool Works in any vise that holds 2/0 hooks. Tool body precision built of stainless steel with brass fittings. Includes 2 stainless steel pins (.041" and .062" dia.) that fit all HMH tubes. Shown in this image is rigid tool clamped in ring clamp with pin then inserted as stiffener. Premium Tube Tool Same tool body as Starter Tool, but with two machined, tapered mandrels, .041" and .062" dia. Includes tool body, premium mandrels that fit all HMH tubes.