Cobalt Drill Bit Aircraft Extension Long Deep Hole Drilling Cobalt Drill Bit Aircraft Extension Long Deep Hole drilling for 6 Inch or 12 Inch Overall Length: Make Easy for Deep Hole Drilling Stainless Steel, Generaly Steel, Alloy Steel, Metal, Iron, Copper, Plastic...Designed to work for all Metalworking, Industrial Projects, DIY Home or Workshops Reparing, Maintenance Works.This Drill can do great works of drilling in various of metal material in DIY Home use or industry use. Bit is precision ground for Drilling Holes in many different materials. HSS Cobalt Drill Bit Features MATERIAL Made of HSS Cobalt Steel with Heat-Treatment for High Hardness and Tensile Strength for Drilling. CUTTING POINT With 135 deg. Split Point Enable Quick Drilling and Easy Pisitioning. SPIRAL FLUTE Spiral Twist Flute Keeps the Fast Chips-Removing and Easy Penetrating During Application. ROUND SHANK Standard Round Shank Is Right Fitting with Various of Chucks of Electric Drills and Machines Tools. How To Use: Cordless Electric Drill Can Be used in Cordless Drill: Make sure the electric cordless drill is fully charged before application Corded Electric Drill Can be used in Corded Drill: Make sure the corded drill is plugged in before application Drill Press can be used in Drill Press: Make sure the drill press is plugged in before application. Cobalt Drill Bit Jobber Length Specifications: ●Size From 1/8 inch to 1/2 Inch ● Cutting Point Angle: 135 Degree ● Angle Point Type: Split Point ● Flute Type: Spiral Twist Flute ● Shank Type: Straight Round Shank ● Surface Treatment: Gold Oxided/Ember Finished ● Specification Met: ANSI ● Packaging: Packed in plastic package ● Application: Drill through Stainless steel, general steel, metal, iron, copper, aluminum, plastic... ● Overall Length 6 Inch or 12 Inch