DEWALT DT4585-QZ Forstner Drill Bit 85 mm Hex Shank 10 mm High Carbon Steel

An 85 mm cutting diameter and precision-ground edges make this DEWALT Forstner bit the go-to for large-diameter, flat-bottomed holes in wood, chipboard, MDF, and plywood. The hex shank locks into 10 mm chucks of corded drills, cordless drills, and drill presses, while the optimized flute design clears chips fast to keep the cut clean and cool.

Overview

The DEWALT DT4585-QZ is a professional-grade Forstner drill bit engineered for woodworkers, carpenters, and cabinet makers who demand clean, splinter-free holes with flat bottoms. Its 85 mm diameter handles demanding tasks like hinge recesses, pocket holes, and overlapping bores in hardwoods, softwoods, and laminated boards. The high carbon steel body provides durability, and the bright finish reduces friction for smoother drilling.

What stands out

• Large 85 mm cutting diameter for big holes without a hole saw.
• Precision-ground cutting edges deliver clean entry and exit.
• Optimized flute design rapidly ejects chips, preventing heat buildup.
• Hex shank (10 mm) prevents slipping in the chuck under high torque.
• Centering point ensures accurate positioning and reduces walking.
• Versatile across corded, cordless, and drill press setups.

Technical details

• Drill bit type: Forstner
• Diameter: 85 mm
• Shank type: Hex
• Shank diameter: 10 mm
• Overall length: 90 mm
• Material: High Carbon Steel (HCS)
• Finish: Bright
• Application: Wood, chipboard, MDF, plywood
• Recommended use: Flat-bottomed holes, pocket holes, overlapping holes
• Quantity per pack: 1 piece

Our verdict

For large, precise holes in wood-based materials, the DEWALT DT4585-QZ delivers the accuracy and chip clearance professionals expect. Its hex shank and robust build make it a reliable addition to any serious workshop.