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.