Feature:1. Using cross shaped hard alloy cutter head design, fast cutting speed, long service life.2. Drill bit set adopts a wider 2 blades design, which makes it easier and faster to remove debris3. 3/8in specification round tool holder is suitable for most electric hammer drills on the market.4. Wide range of applications, suitable for mechanical processing, home improvement materials, construction engineering and other scenes.5. Can easily penetrate various materials, such as tiles, concrete, bricks, glass, plastics and wood, etc.Specification:Item Type: Drill Bit SetMaterial: Cemented CarbideSpecifications: 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 18mmLength: Approx. 160mm / 6.3inTool Handle Type: Round HandleRound Handle Specifications: 3/8inPurpose: Used for DrillingApplicable Scenarios: Mechanical Processing, Home Improvement Materials, Construction Engineering.Package List:7 x Drill Bit