DURABLE MATERIAL: The center punch tip is made of high speed steel that withstands strong impact, resists wear and rust to prolong tool life. High speed steel hardness: HRC58 ~ 60. MULTI-USE: Automatic center hole punch is suitable for a variety of tasks, including metalworking, emergency car tools, emergency hammer use, iron plate positioning, wood positioning, and wall positioning. DESIGN: The pocket automatic center punch features deeply knurled finger grips for easy handling and better control. The non-pinch comfortable cap protects your palm from spring impact. IMPACT STRENGTH ADJUSTABLE: Adjustable impact strength with spring tension that can be set for light or heavy strokes, ideal for marking, punching, and staking. HOW TO USE: Align the punch tip with the desired point. Firmly press the handle against the surface. After a short delay, the strong spring will automatically eject the punch to create a precise indentation. Specifications Material: High speed steel Color: Gold, silver, black Product dimensions: 128mm / 5 inches Quantity: 3 pieces Durable and practical. Ideal for use on wooden planks, fiberboard, particle board, plywood, plastic, aluminum board, and similar materials. Package includes: 1 x Center punch (gold) 1 x Center punch (black) 1 x Center punch (silver) Note: The package includes only the items listed above. Other products are not included. Note: Lighting and monitor settings may cause slight color variations between the image and the actual product. Measurement error allowance: +/- 1-3 cm.