Irwin Industrial 73332 Turbomax Drill Bit, 1/2"

• High performance metal drilling for portable drill users, works well on curved surfaces
• Revolutionary tip design stays sharper longer and drills up to 10x faster than other leading drill bits
• High speed steel features a black body and gold flute
• Self-centering Turbomax tip for clean entry and fast starts; stays sharp longer
• 3 flatted shank on 3/16" and above for better chuck grip
• Size: 1/2"
• Twist Length: 4-1/2"
• Overall Length: 6"