THE SMOOTHEST DRILLING IN ALL YOUR PROJECTS! Deliver an automatic, high-impact, spring-loaded strike on any materials: concrete, brick, glass, metal and so on! IDEAL FOR GENERAL WORKSHOP OR MAINTENANCE USE WHERE HIGH PRECISION AND PRODUCTIVITY ARE REQUIRED. FEATURES High Quality 6542 HSS Carbide with a reinforced head to provide great wear resistance and long durability. Smooth Drilling Each bit is equipped with a split-point tip that helps to increase speed and starts on contact. Wide Applications Effectively and accurately drill on all materials: glass, tile, concrete, brick, plastic and so on! Unique Design Unique U type slot design provides an efficient drilling action and reduced walking for greater accuracy. SPECIFICATIONS Material: Hard Alloy Tool Holder Type: Triangle Handle Cooling Type: Outer Cold Blade Top Corner: 135° Category: Hole expansion drill Optional Style: 6mm, 8mm, 10mm, 12mm Weight: Approx. 180g Blade Diameter: 6-12mm PACKAGE INCLUDES 1 set 6 & 6 & 8 & 10 & 12 mm Drills