Wolfcraft North America - Brad-Point BitsThe Wolfcraft W-shaped bit scored a fair/poor in the entry-hole rating, a good/fair in the through-hole rating, and an excellent in chip clearing.
The author tested eight brands of drill bits for the accuracy of their stated dimensions, the efficiency of their design, and their chip-clearing ability. The 3/8-in. bits were selected for the most rigorous tests, drilling 200 holes in hard maple and 875 in particleboard. The 3/16-in. bits were tested for clogging in pine; the 1/2-in. bits were tested on white oak. He found that the spade-shaped bits performed the worst, the W-shaped bits produced mixed results, and the spur-shaped bits were best overall. The Wolfcraft W-shaped bit bored an exit hole almost as clean as the Fisch Vortex D’s for about one-third the price. The entrance hole, though, was a bit ragged. Also, it bogged down about 5/8 in. into the white oak. This bit scored a fair/poor in the entry-hole rating, a good/fair in the through-hole rating, and an excellent in chip clearing.