Dimension: 10 sizes include 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm and 10mm, 1 piece each size Functions: You can use these useful tools to punch clean and precise holes in canvas, leather, gaskets, plastic, vinyl, rubber and other soft materials Beautiful Design: The sharp edges of these punching tools allow you to easily pierce multiple layers of fabric; And their knurled bodies provide a secure grip for you Good Quality: The hollow punch assembly is constructed of durable and heat-treated carbon steel; The right material provides long-term application Widely apply: Leather hole punching tools can be widely applied for leather, watch band, seal belt, shoe, fabric, canvas clothes, eyelet, etc Useful tools: The hollow punch set is made of durable, heat-treated carbon steel; You can use these helpful tools to punch clean, precise holes in canvas, leather, gaskets, plastic, vinyl, rubber, and other soft materials; They can be widely applied for leather, watch strap, seal belt,