[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, allowing for easy and accurate hole punching without measurement. Features a sloped knife edge for strong penetration, built-in high-strength spring for high elasticity and reduced effort. The punched hole is flat and resistant to deformation, with visible hole positioning. [20 sheets capacity] This heavy-duty punch is suitable for use with edge bandages, film, PS plates, and blisters. [Multi-purpose heavy punch] Ideal for punching edge tape, paper, cardboard, photos, aluminum foil, business cards, tickets, commodity labels, PVC bank cards, and PVC food packaging. Suitable for use in homes, schools, offices, studios, and craft areas. [Paper Punching Single Hole Puncher] Hand-held round hole punch suitable for paper, ID cards, particleboard, thin plastic cards, thin metal, craft paper, art projects, and other materials. Great for DIY crafts, labels, and bills. Ideal for home, office, and back-to-school supplies. You will receive two 10mm hole punchers and two complimentary springs. Color: Black & White Material: Aluminum Size: 10mm Package Contents: 2 x Hole Puncher 2 x Spring Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may have an error of +/- 1-3cm.