When it comes to strength and durability SARGENT continues to set standards with the 8200 Mortise lock. The 8200 far surpasses ANSI/BHMA A156.13 Series 1000 Grade 1 standards making it the strongest and most durable mortise lock in the industry. SARGENT Mortise Locks are designed and constructed with high quality components to provide maximum security performance and durability.