Neiko 02638A 5" Automatic Center Hole Punch | Adjustable Impact 5" center punch is spring loaded with adjustable stroke; can accommodate various types of materials such as wood, plastic, metal, glass, leather Chrome plated shank body withstands high impact force and resists corrosion, extremely strong S2 steel tip holds up to hard surfaces Active spring-driven action and hard steel awl tip makes punching easier; strike force can be increased or decreased with adjustable cap Suitable for a variety of tasks, from construction to automotive; can be used as an awl for belts or glass window breaker for car safety Knurled non-slip surface and precision centered tip increase control for more accurate and precise holes