Contoured design fits comfortably in the palm of your hand, holds sear at the correct angle for precise stoning. Adjustable positioning screw lets you make exact sear angle changes to increase or decrease trigger pull weight. Use with 6'x½'x½' stones to achieve a mirror smooth finish for a clean, crisp letoff. Includes complete instructions and .020' shim. SPECS: Stainless steel. 1' (2.5cm) wide, 4-7/16' (11.1cm) long.