The Elevators Lock-N-Load Anchoring System is made in the USA and constructed of high strength steel to ensure your hunting blind is securely anchored. The package includes four blind anchors. It installs in 3 easy steps: 1. Attach the Lock-N-Load Anchor Brackets to the base of 4x4 platform legs, 2. Drive #5 rebar (not included) through the cross-directional tube, 3. Tighten the retention bolts.