Senrog 12-In-1 Gasket Hole Punch Kit For Leather, Paper, Rubber, And Plastic SENROG 12 IN 1 GASKET HOLE PUNCH SET ?FOR LEATHER,PAPER,PLASTIC AND RUBBER CUTTING. MAKING A HOLE OR A GASKET AND WASHER. 12 Pcs punch size: 3/16?,1/4?,5/16?,3/8?,7/16?,1/2?,5/8?,3/4?,7/8?,1?,1-1/8?,1-1/4?. Senrog 12 in 1 washers and gaskets hollow hole punch kit and leather punch set.Thishollow punch set can punch regular round holes and also punch beautiful washers and gaskets. Diameter from 3/16? (5mm) to 1-1/4? (32mm). The set of punching tools in housed in a sturdy and nice plastic case and consists of a handle with centering function and 12 interchangeable punches. 12 Pcs punch size: 3/16?,1/4?,5/16?,3/8?,7/16?,1/2?,5/8?,3/4?,7/8?,1?,1-1/8?,1-1/4?. Punch of any size can be mounted on the handle and can be punched individually or in two parts to make a gasket. When you make a washer, You need to punch in two times, First punch out the outer diameter,Then change to the inner diameter punch, Find the center point of the first time and punch out the inner diameter again (Find P.5) The center point of the head of the handle is retractable, allowing you to find the same center of the circle when you punch the second time, making your washer more precise and not out of position.