STEELMASTER by MMF Industries 261401804 Nylon Vault Key-Hole Signals, Nylon, Black, 25/Box MMF261401804 MMF 261401804, Nylon vault key-hole signals are color coded by category. Colorfast, won't chip, and reusable with prongs that securely engage lock tumblers for tight key-hole fit. Withdraw and use again as needed. Offset head properly centers signal over key-hole opening. One universal size, 7/8" prong with 1/2" head, designed to fit most popularly used brand locks. U.S. patent no. 4,118,962. Black vaul key-hole signal used when for vault owner "Death". Key Capacity: N/A; Material(s): Nylon; Color(s): Black; Width: N/A., UPC078541021846