[1-hole punch] Single-hole punch hole size: 10mm, 3/8 inch(round) [Design of Punching Scale] The scale is fixed at the hole position, so it is easy to punch holes, and it can be punched accurately without measurement. Flushing the edge of the slope knife, strong penetration, built-in high-strength spring, high elasticity and labor saving. The perforated hole is flat and not easy to deform, and the position of the perforated hole can be seen. [20 sheets capacity] This heavy punch can be used for edge bandages, ,PS plates and blisters. [Multi- heavy punch] This punch or edge tape, paper, cardboard, photos, aluminum foil, , business cards, , tickets, commodity labels, PVC bank cards, PVC food packaging, suitable for families, schools, offices, studios, craft , etc. [Paper Punching Single Hole Puncher] Hand- round hole punch is very suitable for paper, ID card, particleboard, thin plastic card, thin metal, craft paper, art project or other materials, DIY craft paper, labels and bills, and is very suitable for home, office and back-to-school supplies. You will get two 10mm hole puncher and two complimentary springs. Colour:Black & White Material:aluminum Size:10mm Package Contents: 2 * hole puncher 2 * spring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.