The Diablo FB-009 1-1/4 in. High-Speed Steel Forstner Bit is a wood-boring bit for clean, controlled hole drilling in wood. This is a Forstner bit designed for drilling straight, angled, and overlapping holes in wood. Model Number: FB-009. If you need a flat-bottom hole with better edge quality than a standard twist bit or spade bit can give you, this is the right style of accessory.

At 1-1/4 in. in diameter, this bit is sized for larger boring tasks where hole quality matters. Diablo calls out its double-ground serrated edge for reduced splintering and chipping, and that is the kind of detail that makes a difference when you are working in hardwood, softwood, plywood, laminate, MDF, particle board, or pressure-treated lumber. The steep angled cutting edges are built to create smooth, flat holes while helping move chips out fast.

The ultra-sharp spur is there for one main reason: accuracy at the start of the cut. A good Forstner bit should not wander all over the surface before it bites, and this one is designed to stay put. That is especially useful when you are drilling overlapping holes or starting near an edge, where control matters more than brute force.

Build quality is straightforward and practical here. The hardened high-speed steel body is made for longer life and a sharper edge, while the forged construction adds durability for repeated use. This is not a general-purpose masonry or metal bit. It is a purpose-built wood drilling accessory for users who care about hole finish, predictable tracking, and clean chip removal.

On the tool side, the bit uses a 3/8 in. straight shank and requires a minimum 3/8 in. chuck size. It is best used in a hand-held drill or a drill press, which gives you flexibility depending on the job. In a drill press, you get maximum control for repeat work. In a hand-held drill, it gives you the ability to bore larger holes on installed material where taking the workpiece to the shop is not an option.

This bit makes the most sense for woodworkers, finish carpenters, cabinet installers, remodelers, and serious DIY users who want a cleaner result than a rough boring bit can deliver. If the job calls for flat-bottom holes, overlapping holes, or controlled boring in sheet goods and solid wood, the Diablo FB-009 1-1/4 in. High-Speed Steel Forstner Bit is the kind of bit you keep in the case because cheaper ones usually show their flaws fast.

Diablo FB-009 1-1/4 in. High-Speed Steel Forstner Bit Gets the Job Done Clean

If you need a bigger wood-boring bit that starts accurately and leaves a clean flat-bottom hole, this one is an easy yes.

• Who it's for: Woodworkers, trim guys, cabinet installers, and serious DIY users drilling clean holes in wood instead of rough utility cuts.
• Why it stands out: The sharp spur, serrated cutting edge, and hardened steel body are the details that separate a decent Forstner bit from one you actually want to keep using.
• Worth knowing: This is a single bit, not a set, and it needs a 3/8 in. chuck minimum. Make sure your drill setup matches before you order.

• What material is this bit designed to drill? It is designed for wood and is listed for use in hardwood, softwood, plywood, MDF, laminate, particle board, chipboard, veneered plywood, and pressure-treated lumber.
• Can this bit drill angled and overlapping holes? Yes. Diablo specifically lists it for straight, angled, and overlapping holes in wood.
• What size chuck do I need? This bit requires a minimum 3/8 in. chuck size and uses a 3/8 in. straight shank.
• Can I use it in a drill press? Yes. It is listed as best suited for use in either a hand-held drill or a drill press.