4mm Security Anti-Theft Allen Wrench For Peerless-AV TV Mounts (From ACC925 Kit).

This is a special, difficult to find allen wrench that is for security fasteners included with Peerless-AV VESA TV Wall Mounts. I haven't seen an allen wrench like this for purchase any where, they are proprietary allen wrenches for the anti-theft fasteners on the expensive, professional-grade Peerless-AV wall mounts.

There are various fastener kits that this allen wrench is included in, including ACC925 and ACC918.