Sturdy and durable: These hollow punch tools are made of heat-treated carbon steel with sharp cutting edges and a knurled body for enhanced grip. They deliver clean, precise holes and are built for long-lasting use. Practical design: The hollow punch easily cuts through leather and multi-layered fabrics. Various round hole sizes create unique artistic and aesthetic effects. Easy to use: Place the punch in the desired location, then strike the back end firmly with a hammer or mallet. The smooth handle design helps prevent hand discomfort during use. Includes 12 different sizes: 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm. Note: This is a sharp tool. Keep out of reach of children. To prevent rust, store with a light coat of oil and clean before use.