Precise details: Drillpro 6mm Automatic Center Pin Punch, Spring Loaded Marking Starting Holes Tool Specifications: Drillpro 1#: General type 6mm automatic center pin punch 2#: With red hat 6mm automatic center pin punch Material: Bit material: HSS steel Main body material: Tool steel Total Length: Approx 128mm Bit diameter: 6mm Features: Adjustable Automatic Center Punch Automatic design cleanly and accurately punches steel, wood, and plastic, gives precise starting point on steel and other solid materials. Window Breaker Can also be used for emergency escape, crushing broken windows. No Slip Knurled handle prevents slipping. Enlarged plastic handle for impact cushioning. Spring-loaded Delivers high-impact. The use of the body of the spring to generate the impact force to punching. Convenient Use Allows you to easily mark work using one hand prior to drilling which will prevent the drill from slipping. Package Included: 1 x Automatic punch tool