Northern Industrial Tools Air Tool Kit — 71Pc Set . This Northern Industrial Tools 71Pc Air Tool Kit includes a 3/8 in ratchet wrench with 8pc socket set, a 1/2 in impact wrench, 1/4 in die grinder, a 150mm air hammer with round chisel set Also includes a 10pc 25mm bit set, 10pc shank stone set, 5pc sanding paper set, plus hand wrenches, polish wheel, blow gun, hex key, adapters, nozzles and ...