The AEB1750 security escutcheon achieves 2 star security, and corrosion resistance in excess of grade 4 (240 hours). Approved by Secured by Design, it meets the security requirements of the UK police flagship initiative supporting the principles of 'designing out crime'. The external section is constructed from grade 316 stainless steel, and includes hardened steel keyway protection disc providing enhanced cylinder protection. We highly recommend teaming this with our 1 star cylinders to create 3* maximum security.