Designed by Diablo for serious woodworkers, the Diablo 1-1/2 in x 5-1/8 in Self-Feed Bit with a 7/16 in hex shank delivers fast, clean holes in wood with fewer passes and less effort. Built from hardened steel, this bit stands up to repeated use in both softwoods and hardwoods while maintaining precise hole diameter and a smooth exit.
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Self-feed design uses a sharp screw tip to pull the bit into the workpiece, reducing wandering and letting you drill straight, large-diameter holes with control.
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Hex shank at 7/16 in provides a secure, slip-resistant grip in quick-change chucks and high-torque impact drivers, minimizing bit slippage during heavy drilling.
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Drill size of 1-1/2 in enables rapid creation of large holes—ideal for conduit and cable runs, hardware passes, or oversized dowel work.
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Overall length of 5-1/8 in offers reach in tighter spaces while preserving rigidity for a clean exit.
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Material is hardened steel, delivering durability and long wear life for demanding automotive, carpentry, and workshop tasks.
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Packaging in a protective tube and includes one bit per package, ensuring safe storage and easy setup.
Who benefits from this Diablo self-feed bit
Carpenters, cabinet makers, electricians, and DIY enthusiasts who frequently route large-diameter holes in wood will appreciate the efficiency and precision of this bit. Use it when running electrical conduit, setting up large hardware installations, or creating openings for plumbing and pass-throughs where a clean, true hole is essential.
Practical tips for the best results
- Let the self-feed tip do the work—avoid forcing the bit through the material to minimize tear-out and maintain hole accuracy.
- Start with a pilot hole if working hardwoods to further reduce resistance and improve hole cleanliness.
- Match your drill speed to the material; slower speeds for hardwoods and faster speeds for softwoods can optimize bite and finish.
- Inspect the bit regularly for dulling; a sharp bit preserves hole quality and extends tool life.
