● The hexagonal handle is , not easy to slip , and the electric drill is more stable ● Tip : Lithium batteries below 18V are not recommended , because they are too weak and cannot be used ● : Hard alloy steel cutter for head , four-blade design , low cutting resistance ( higher hardness than ordinary drills ● It is suitable for electric drills , for bench drills and other general drills , but not for percussion drills ● It can be used to holes in glass , ceramic tiles , plastics , wood , concrete and other materials, Manufacturer: Watreketal