A box extender that cracks when you drive the fastener, or doesn't bring the old work box flush to the new wall surface, costs a callback before the wall goes up. This non-metallic 1-gang box extender slides over the existing electrical box and brings it flush to the wall surface — the depth is enough to account for the added drywall layer. The PVC formulation snaps onto standard single-gang boxes and holds without cracking. Standard for renovation contractors across northeast Nebraska and northwest Iowa who need to match existing box depths after adding wallboard. In stock at Crofton Lumber (Crofton, NE) and Akron Lumber (Akron, IA) — ready for pickup today. Stocked at Crofton Lumber and Akron Lumber.