The Diablo Impact Step Drill Bit drills multiple hole sizes from 1/4" to 1/2" with a single bit across 13 finer increments, providing precise hole sizing for electricians, plumbers, and HVAC contractors. Featuring a split point tip and impact-rated construction, this step bit delivers fast, accurate holes in thin metals, PVC, and plastic materials up to 1/8" thick.

• 13 steps covering 1/4" to 1/2" diameter range with finer increments
• Split point tip (132 deg) starts on point without walking or pre-drilling
• 1/4" hex shank fits all drills and impact drivers
• Precision CNC grinding ensures strict angle tolerances on each step
• Optimized dual flute design for jam-free cuts
• Increased step heights for easier, more accurate drilling
• Laser-marked steps for easy size identification
• For metal up to 1/8" thickness, PVC, and thin plastics