Specialty Locksmith Stamps by HPC
Features: Permanently mark master or restricted keys. Let other locksmiths and key duplicators know it is a special purpose key and is part of a restricted system. The stamps are made of heavy duty steel stock, 3/8" (9.5mm) x 5/8" (16mm) with 1/16" (1.57mm) characters. Hardened and zinc plated for years of trouble free service.
LDND: DO NOT DUPLICATE. LDNC: DO NOT COPY. LMS: MASTER.