PERFECT FIT REPLACEMENT: Specifically engineered as a direct replacement for the Hooply 1021 (MP96700) series gearbox, ensuring a seamless fit for specialized steel security door systems. PRECISION MEASUREMENTS: Features a standard 60mm Backset and 68mm PZ centers; please verify your existing case dimensions (175mm height x 90mm depth) to ensure 100% compatibility before ordering. HEAVY-DUTY SECURITY: Constructed from high-strength, zinc-plated steel for maximum durability and corrosion resistance, providing long-term reliability for high-traffic security entrances. UNIVERSAL REVERSIBLE LATCH: Designed with a non-handed, easy-to-reverse latch mechanism that can be switched in seconds to suit both left and right-hand opening doors without opening the casing. SMOOTH LIFT-LEVER ACTION: Built for effortless operation, this gearbox supports dual-spindle setups and provides the robust mechanical engagement required for multi-point locking rods., Weight: 1.984160358 Pounds, Manufacturer: UPVCSTORE