MS1 ADJUSTABLE MANUAL SHARPENER SUITABLE FOR SHARPENING ALL CHAINSAW AND CHAINSAW CHAIN TYPES. 1/4" - .325" - 3/8" LOW - 3/8" - .404" THE MS1 CLAMPING SCREW IS MORE ERGONOMIC AND EFFICIENT. THE 2 KNOBS WITH THEIR FIXING SPRING ALLOW FOR MORE PRECISE AND EFFICIENT ADJUSTMENT OF THE CHAIN TENSIONER JAWS. SUPPLIED WITHOUT FILE. CODE: R315654 ORIGINAL CODE: CZ