Irwin Speedbor Drill Bit Extension

Drill through thick wood blocks with this Irwin Speedbor drill bit extension. The shank holds spade drill bits, which are useful for creating holes in lumber or boards. The added length of this drill extension gives you the reach you need to drill into recessed areas or to go through thicker blocks. An included Allen key allows you to tighten the extension so that the bit stays in place even at high speeds.