Meet the Diablo Speedemon 3-5/8 in x 5-1/8 in L Steel Self-Feed Bit with a hex shank—built to tackle large-diameter wood holes with precision and efficiency. Crafted from durable steel, this self-feed bit is designed to bite in and push forward, delivering cleaner holes and reducing the need for pre-drilling or multiple passes.
Key specifications at a glance
- Overall length: 5-1/8 in
- Drill size (hole diameter): 3-5/8 in
- Shank diameter: 7/16 in
- Shank type: Hex Shank
- Material: Steel
- Package: Tube (1 piece)
- Brand/Sub Brand: Diablo / Speedemon
Why this bit stands out
The Speedemon self-feed design is purpose-built for fast, confident drilling into wood. Rather than skimming or wandering, this bit’s geometry guides itself into the material, producing true, straight holes with less effort and fewer interruptions. The 7/16" hex shank ensures a secure grip in most drill chucks and impact drivers, so you stay in control even under higher torque. Sized at 3-5/8" and 5-1/8" long, it’s an efficient choice when you need a large-diameter hole without switching tools mid-project.
Ideal use cases
- Creating large pass-through holes for cables, conduit, or plumbing in wooden studs, beams, or cabinetry.
- Rough-in work in carpentry, furniture making, and DIY builds where speed and hole uniformity matter.
- Situations where a pilot hole isn’t desirable or practical, allowing you to bore quickly with fewer passes.
How to get the best results
- Use a drill or driver that accepts hex-shank bits for a secure, slip-free experience.
- Let the bit do the work—apply steady, moderate pressure and let the self-feed action pull the bit through the material.
- Keep the bit sharp and clean; wipe away dust after use and store in the included tube to prevent damage.
Practical notes
Packaged in a sturdy tube for protection and easy organization, this single Diablo Speedemon self-feed bit is a reliable addition to any woodworker’s toolkit. Its steel construction and precise 3-5/8" bore size make it a practical choice for professional carpenters, electricians, and serious DIY enthusiasts who frequently need clean, oversized holes in wood.
