Drill America 7 Piece Screw Machine/Stub Cobalt Drill Bit Set, Plastic Pouch Case, D/ASTCO

Set contains 1/8", 3/16", 1/4", 5/16", 3/8", 7/16" and 1/2" stub length drill bits in plastic pouch case. Drill America D/ASTCO Series Cobalt screw machine drill bits (also know as stub or stubby drills) are manufactured to Aerospace Standard 907. The 135 degree split point is self-centering and reduces thrust. Ideal for portable or machine drilling. Short, rugged construction performs well in a broad range of materials in the iron and steel families. Screw machine drills are popular in the automotive and construction industries. They are often used in screw machine setup where spindle clearance is limited. Sizes smaller than 1/16 and larger than 1/2 have the 118 degree standard point

• Set contains 1/8", 3/16", 1/4", 5/16", 3/8", 7/16" and 1/2" stub length drill bits in plastic pouch case
• Screw machine drills are also know as stub or stubby drills. They have a short, rugged construction performs well in a broad range of materials.
• 135° split point tip for fast penetration and accurate drilling and round shank for use in a wide range of tool holding systems
• Popular in the automotive and construction industries. They are often used in screw machine setup where spindle clearance is limited
• Cobalt drill bits are are effective in drilling tough, high tensile strength materials. They display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed