Click or scroll to zoom Tap or pinch to zoom Lock Technology 840 Air Hammer Wrench Driver In Stock $63.15 SKU LT840 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Use your air hammer to drive your wrenches in difficult and hard to reach areas. Long reach - 19 1/2". Fits any wrench. Use on crank pulley bolts, fan clutches, and any inaccessible bolt or fastener.