Features: 1.Includes 7pcs interchangeable punch head sized 2/2.5/3/3.5/4/4.5/5mm to punch different s of round holes. 2.Fluted design for easy discharge of leather waste. 3.Heat treated and hardened for edges that keep sharpness. 4.Non-slip knurling design allows you to grasp the punch tool steadily so you can punch holes more accurately. 5.Gently punch a circle with the punch to make sure it is the hole you want. specification: Includes 7pcs interchangeable punch head sized 2/2.5/3/3.5/4/4.5/5mm to punch different s of round holes. Fluted design for easy discharge of leather waste. Heat treated and hardened for edges that keep sharpness. Non-slip knurling design allows you to grasp the punch tool steadily so you can punch holes more accurately. Gently punch a circle with the punch to make sure it is the hole you want. Hit the butt of the hole punch with a standard hammer. It is best to use medium density wood or plastic as a backing. : Material: Carbon Steel Color: Black Punch Head Size: 2/2.5/3/3.5/4/4.5/5mm Package List: 1 x Leather Hole Punch Set