Size Information: Full length is approx. 5 inch,tip overall length is approx. 1.8 inch.Durable Material:The center hole punch anti-slipping shank body is made from best quality high speed steel and chrome plated tips,which have deep knurling on the surface, withstands intense impact force for a long time to use. The red adjustable impact cap is made of ABS plastic, and can be increased or decreased striking force.Easy to Use: Determine drilling spot on material which you want to make,align tip of center punch to spot.Press the cap of handle firmly,place drill bit tip on marked point and the strong spring will pop-up the punch strongly. It will leave a mark of the hole on the itemWide Application: Must-haves for centering project for wood, steel, marble, glass, etc. Suitable for construction to automotive, glass window breaker.Package Include: You will receive 2pcs automatic center punch with 2 different colors and 2pcs alternate head totally. Satisfying different needs.Colour:red+blueMaterial:MetalPackage Contents:2 x Automatic Center Punch2 x Alternate HeadOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.