DURABLE DESIGN: Delivers 2x life versus a standard impact-rated hole saws BI-METAL 8-TPI TEETH: Engineered for optimal cutting in sheet metal EXTREME PERFORMANCE: Built for clean, fast cuts in today's high-torque impact drivers DEPTH STOP: Helps prevent breakthrough and provides accurate hole depth for more precise drilling PILOT BIT SPRING: Provides automatic plug ejection 1/4 IN. HEX SHANK: Offers compatibility with most drills and 1/4 in. hex shank impactors INTEGRATED ONE-PIECE DESIGN: Presents convenience with no separate arbor or pilot bit required