Clamping Lever for Tightening Bolt Adjustment and Tube Gripping by HM Tools & Dye Years of tattoo experience and the desire to provide only the finest machines led to the start and growing success of HM Tools & Dye. The HM Tube Vice Power Tool operates as a lever to forcibly tighten bolts with ease. This power key allows artists to establish a firm clamp no matter the size and brand of disposable tattoo tube being used. This device also comes equipped with a hexagonal screw at the top to adjust the positioning of the bar on your machine. Specifications: Operates as a clamping lever Equipped with hexagonal screw at the top Used to forcibly tighten/adjust tightening screws HM Tools & Dye owned and operated by tattoo artists Manufactured in Madrid, Spain