HMH Tube Vise Converter lets you convert your HMH vise into an in-line rotary tube vise. This upgrade enables direct chucking of tubes in steel jaws, delivering clean, repeatable holds and improved access to the top, bottom, and sides of your pattern. Designed to fit standard HMH vises, mount tubes with or without junction tubing installed, and with or without pins or mandrels. The sleeker profile leverages the rotary capability and reduces interference during material loading. Comes with two premium mandrels and sample tubes. - Converts an HMH vise to an in-line rotary tube vise - Directly chuck tubes in steel jaws for secure, repeatable holds - Mount options with or without junction tubing; with or without pins/mandrels - Sleeker profile improves access to the work surface from top, bottom, and sides - Includes two premium mandrels and sample tubes for rapid setup - Durable steel construction designed for repeated, long-term use