The hollow punch is easy to use, by placing a washer hole where the punch needs a hole. These are very nice work tools. Because of the many different diameters, you have many applications for correct punching. If the material is relatively strong, you can also use hammers to help. Since the punches are made of premium steel, they are very strong. Features - Color: Black. - Material: Steel. - Size: 8.20X0.80X0.80cm/3.22X0.31X0.31inch. - Hollow punch made of durable, heat treated carbon steel, so that it is not easy to damage and can be used for a long time. - Can quickly help you punch holes in the . They can operate independently and are easy to use. - Hollow punch can be used for hobbies, crafts, modeling, home repair, etc. - Fine workmanship and creative appearance ensure its popularity and practicality. - For punching holes in , watch band, gasket belt, shoe, plastic, vinyl, thin canvas clothes, eyelet, etc. Package list: 6 x Hole Punches