... 8mm,10mm,12mm, 15mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, 45mm ,50mm 55mm, 60mm. ENGINEERED TO ... THESE BITS DONOT HAVE A PILOT DRILL, THERE ARE BEST USED IN A DRILL PRESS OR WITH A GUIDE TO START ... OR CLAMPED TO THE JOB. UNTILL IT STARTS TO DRILL THEN I REMOVE THE PIECE OF WOOD AND CONTINUE ... DRILLING. I USE A CORELESS DRILL AT A LOW SPEED WITH A SPRAY BOTTLE FOR ...