The birch is a mid-toned brown with knots throughout

015 Dia x 1/2 x 1/4 – 28 Thread

A two-flute bit is a good general-purpose choice

and even light brown grain

Prestige General Purpose Blade - 10" Dia 40T ATB- 18° - 5⁄8 Bore | PR1040 Stone The birch is a mid-tonedPR1040. Carbide Tipped Prestige 10 Inch Dia 40T ATB, 18 Deg, 5 8 Bore. The Amana Tool Prestige general purpose blade cuts smoother and stays sharper, for longer, in solid wood, plywood, MDF and chipboard. It features a massive tool steel plate (. 102 thick!) with expansion slots and copper plugs that practically eliminate vibration. The 40 teeth are ground with a steep 20 bevel angle, alternating left and right, for crisp, clean cuts both across grain