3Pcs Hex Countersink Boring Bore Quick Change Drill Bit Tool Set for Wood Metal

• Precision-ground 90 tip for countersinking into most machinable metals, wood or plastic
• Made from high carbon steel for increased durability
• Includes a black oxide finish for added corrosion resistance
• Five flute design reduces vibration for smoother drilling and extended life
• 1/4" round shank fits all handheld and stationary drills
• Material: high carbon steel
• Size: 12mm 16mm 19mm
• Shank diameter: 6.35mm (1/4 inch hex shank)
• Surface treatment: blackening treatment
• Heat treatment: high frequency quenching, enhance the hardness

Package includes:

• 3 pcs Countersink Drill