This stainless steel single cylinder deadbolt from Tell Manufacturing Inc. is a standard duty commercial grade deadbolt from their SV series. Constructed with a tubular steel chassis, keyed with thumb turn interior, adjustable back set and featuring a Schlage 6-pin solid brass key way this stainless steel deadbolt features a roller bar for added security against hacksaw and reciprocating saw attacks. It is ANSI compliant and rated for 150,000 cycles.