Precision woodworking with IRWIN Marples Forstner Bit Set IRWIN Marples Wood Drilling Forstner bits are built from tough carbon steel designed to stay sharp and deliver clean, flat-bottomed holes. The bits support accurate pocket holes in both soft and hard woods, making them a reliable choice for fine woodworking, cabinetry, and detailed projects. In practice, the ultra-sharp teeth use optimized angles to slice through wood with minimal resistance. The result is smoother cuts, a more consistent hole diameter, and a noticeable reduction in drilling time compared with traditional Forstner designs. The bits feature a reduced shank that fits 3/8" and larger drills and drill presses, enabling use with many common shop machines. This makes them well-suited for bench-top work, stand-alone drill presses, or portable setups where precision matters. What you get Eases cutting of clean flat-bottomed pockets and holes with consistent depth Ultra-sharp teeth deliver smooth cuts in hard and soft woods Potentially shorter drilling times versus older forstner designs Reduced shank fits 3/8" and larger drills and drill presses 1/4" (6.3mm) 3/8" (9.5mm) 1/2" (12.7mm) 5/8" (15.8mm) 3/4" (19.0mm) 7/8" (22.2mm) 1" (25.4mm) 1-3/8" (34.9mm) FAQ Q: What projects is this IRWIN Marples Forstner Bit Set best suited for? A: Great for cabinet making, fine woodworking, and joinery where clean, flat-bottom holes help fit hardware. Q: Will these bits fit my drill? A: Yes. The bits have a reduced shank compatible with 3/8" and larger drills and drill presses.