Feature:1. HIGH STRENGTH: Inclined angle eccentric drill adopt industrial strength hard high speed tungsten steel M35 to ensure efficient and stable drilling, specializing in solving deep holes, inclined holes, blind holes, etc., exellent materials, strong and long lasting, the drill is not easy to erosion or deformation2. FAST CHIP REMOVAL: Drill bit unique eccentric M35 head design allow easy penetration of various materials, and the U shaped rotary groove effectively prevent chip accumulation and retention3. WIDE RANGE OF APPLICATION: High strength bevel special eccentric twist drill is suitable for a variety of materials, such as stone, concrete, wood, steel, brick wall, plastic, tile, marble and so on4. DRILL SIZE: The 5 piece twist drill set consist of 2 x 1/4in(6mm), 1 x 5/16in(8mm), 1 x 3/8in(10mm) and 1 x 1/2in(12mm) in various sizes to meet the needs of daily use, and the drill is hex shank type for a wide range of uses and stronger grip5. SUITABLE FOR MACHINE: High strength bevel angle special eccentric twist drill is suitable for charging drill, hand drill, bench drill, etc., easy to use, high efficiencySpecification:Item Type: Crooked Head Eccentric DrillMaterial: Hard high speed tungsten steel M35Size: Approx. 6mm / 0.24in, 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in, 12mm / 0.47inShank: Hex Shank 6.35mm(1/4in)Compatible Devices: Hand drill, cordless drill, bench drillApplication: Suitable for glass, ceramic, full tile, granite, concrete, wood.Package List:5 x Drill Bits1 x Storage BoxNote:Dry drilling is allowed. It is recommended to add water for better durability, but no need to add water when drilling into wood.