The SE 6 mm Metal Punch with Lightning Bolt Design is made of 40 CRV steel and features 56 to 58 HRC hardness. This punch creates a precise lightning bolt design and is great for marking jewelry, leather, plastic, soft metal, wood, and more. You should strike the stamps with a hammer or mallet to make impressions on flat surfaces. Warning: Using hand tools can be dangerous. Keep away from children. Bystanders and yourself should always wear protective eyewear. Do not strike hard materials as chipping may occur. Do not use tool if damaged. SE is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness of our SE 6 mm Metal Punch with Lightning Bolt Design. IPR Rights Notice: Important: Avoid getting counterfeit items. Genuine SE products come with the SE logo on the packaging. SE is a registered trademark protected by US trademark law.