Specification: Material: Knurled steel body + alloy stell point Length: approx. 127mm Simple And Accurate To Use, Semi Automatic Window Breaking Device Knurled handle prevents slipping Gives precise starting point on steel and other solid materials Allows you to easily mark work using one hand prior to drilling which will prevent the drill from slipping Automatic Spring Loads Then Releases At Top Of Cycle With Force To Create Center Punch (No Hammer Needed) Spring pressure can be adjusted by simply rotating the knurled top of the punch Automatic design cleanly and accurately punches steel wood and plastic Package included: 1 x automatic center punch (other accessories are not included) Note: Please allow 1-5mm errors due to manual measurement Item color displayed in photos may be showing slightly different on your computer monitor has been calibrated same