Features: Six flute bevel Debur countersink 1/4" Hex. Great for sinking 90 degree holes into wood and soft metals in countersunk screw preperation. Heat-treated steel carbon blades ensure good tool life. Cut quickly and easily in wood, soft metal, rubber, plastic and other machinable materials. Perfectly centered holes every time correctly seated screw heads. Specification: Material: 45# Steel Length: 36mm/1.42inch Diameter: 13mm/0.51inch Shank Diameter: 6.35mm/0.26inch Color: Grey Quantity: 1Pc Note: 1. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Included: 1x6 Countersink Countersink for Borehole (Without Retail Package)"