This tube cutting jig will help you make straight perpendicular cuts in wire, tube, and round stock. It holds and cuts pieces up to 3/8" (9.0 mm) in diameter. It can help cut uniform pieces from 3/32" (2.4mm) to 3.125" (79.4mm) in length. Hold the tube in the V-slot jig with the pivoting clamp and secure the adjustable stop with the thumb screw. Insert the blade of your jeweler's saw into the guide and saw gently to cut the tube. It is made of hardened tool steel with a coated handle. It can be used by hand or in a vise. Overall dimensions: 4.75 x 3.75 x 2" (12.1 x 9.5 x 5.1 cm)