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IRWIN 49912 Auger Bit Power Drill Auger Bit, Solid Center Flute, 4-1/2 in L
Full length heat-treated bit with wide lands keep the bit straight as it bores through the hole. The flutes are ground behind the lands to funnel chips to the inside of the bit and away from the outside diameter. Single spur cutting edge scribes the circumference of the hole, coarse screw point provides fast boring in hard and soft woods. All bits have a 4-1/2 in twist length and a 7-1/2 in overall length.
Freud Precision Shear PB-011 Forstner Bit Forstner Bit, 3/8 in Dia Shank
New Precision Shear? Forstner bits feature a double-ground, razor-sharp serrated edge that slices throughout the rotation of the bit for less splintering and chipping, producing flawless flat bottom holes. This unique geometric design has multiple cutting edges that produce greater shearing action, allowing for faster rotational speeds and more efficient cutting. Competitive Forstner bit designs produce small chips and dust that collect in the cutting area, increasing friction and heat, thus causing the bit to dull quickly. Those designs also create holes with rough edges that require sanding. In addition Precision Shear? Forstner bits has serrated edges.
