No need to knock: The leather punch adopts the automatic belt punch spiral design targets the punching position of the belt and pushes down to complete the punching task. Automatic Belts Screw Punch saves time and energy without making noise then correctly place the punch in the position to be punched, then press the punch handle. 6 punch sizes: The punch in leather is equipped with 6 interchangeable punching heads of different sizes with hole diameters of 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm. You can choose the hole size according to your preference. Sturdy Material: Belts Self Drilling Screws is made of high quality wood and brass logs and is spiral brass with center joint. The surface is painted. It is durable, non-slip, comfortable will not feel after long time use. Wide Application: Automatic Hole Puncher can be widely used in sewing, leather, paper, printing, rubber, plastic, fiber and felt, and other crafts Instructions: 1. Remove the upper connecting rod screw 2. Install the required pad and tighten the screw to secure the pad 3. Attach the leather and pad at 90 degrees perpendicular to the surface of the leather 4. Push the handle to the required position to punch holes (if the leather is thicker, it will need to be pushed several times). Scope of delivery - 1 * hole punch leather for sewing - 6 * Interchangeable drilling Color as shown Material: steel + copper + solid wood Process : fine grinding Specifications: 130mm*25mm Aperture: 1.5/2/2.5/3/3.5/4 mm Quantity delivered: 1 piece