Corbin Russwin’s CL3100 Series is the ideal solution for the toughest environments within education and healthcare facilities. With unique T-Zone lock construction tested to over 15 million cycles, and over 3000 inch lbs. or torque, the CL3100 Series provide strength and reliability that easily exceeds ANSI/BHMA Grade 1 requirements for torque and cycle testing and will outperform all competitor locks with its impressive reliability and durability. The design also simplifies facility maintenance by utilizing a single lock body for all functions. Flexible, strong, and durable – this lock can take whatever you give it.