An impact extension that walks off a farm equipment transmission bolt in a deep recess costs you an hour and a trip back to the truck. This 1/2-inch drive extension keeps the socket locked on from the first strike — the magnetic holder is what separates an impact extension from a socket extension you grabbed out of the drawer. The 6-inch length covers the reach you need into transmission pans, crossmember bolts, and other recessed fasteners where a 3-inch just doesn't get you there, but a 10-inch would be too much control loss. Chrome vanadium steel stands up to repeated impact loading without deforming. Standard in mechanic and ag equipment service trucks across northeast Nebraska and northwest Iowa — what the guy who fixes tractors keeps in his 3/8-inch set. In stock at Crofton Lumber (C Stocked at Crofton Lumber and Akron Lumber.