The tool is used for drilling the mobile phone shell and can be made into various round holes, square holes and elliptical holes. characteristic: Reusable and ecological. Alloy steel, durable. It's very useful to make a hole in the phone shell and other small things. A variety of different forms to meet your different needs. The utility model provides a punch with a hammer commonly used in families, which is sleeved on the sleeve and can punch holes. Specifications: Material: alloy steel Type: 24 pieces, 39 pieces, 52 pieces (optional) Package weight: 24 pcs: 160g / 5.64oz 39 PCs: 314g / 11.08 oz 52 PCs: 452g / 15.94 oz Package size: 24 pieces: 128 * 60 * 2.3 mm / 5.04 * 2.36 * 0.09 inch 39 pieces: 178 * 105 * 2.35 mm / 7.01 * 4.13 * 0.09 inch 52 pieces: 178 * 105 * 2.35 mm / 7.01 * 4.13 * 0.09 inch Packing list: 52 * strike