Dewalt DWA1786IR Impact Ready Titanium Nitride Step Drill Bit 3/16" - 7/8" 12-Step

The DeWalt DWA1786IR is a professional-grade Impact Ready step drill bit engineered for use with both impact drivers and rotary drills.

A titanium nitride (TiN) coating over a double-spiral flute design maximizes durability and promotes efficient chip evacuation, helping the bit run cooler and last longer than uncoated alternatives. The split-point tip bites into material on contact, reducing walking and increasing drilling speed without a center punch. Step sizes are laser-engraved directly onto the bit body for clear, long-lasting readability during use.

Key Features:

• Impact Ready design — optimized for use with 1/4" hex shank impact drivers
• Also compatible with standard rotary drills
• 12 stepped hole sizes: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", and 7/8"
• Titanium nitride coating with dual spiral flute for extended tool life and superior chip removal
• Split-point tip starts on contact — no center punch required
• Laser-engraved step markings for easy size identification
• 1/4" hex quick-change shank
• Overall length: 3.4"
• Step depth: 5/32"

The DeWalt DWA1786IR step drill bit is an ideal tool for electricians, HVAC technicians, fabricators, and general contractors who need a reliable, multi-size solution for drilling clean holes in thin materials. Backed by DeWalt's IMPACT READY® system for maximum compatibility and performance.