Introduction Compact design, low headroom for wider usage High precision machining gears with higher strength, and better toughness High precision sealed bearing with lighter hand force and higher mechanical efficiency Impact resistant gear cover, improving the strength and hardness Double pawls brake system - reinforced pawl, ratchet disc and brake Disc Double high precision CNC machining load chain guides Dust cover on brake system can effectively prevent rain and mortar intrusion Engineering optimized hand chain wheel groove and unique curled edge for the hand cover, preventing hand chain stack in fast operation High quality alloy steel forging hook T80 load chain with high precision, high strength and chain strength up to 1000N/m2 High strength chain end connection, with 2.5 times safety factor Super robust, much higher than 1500 cycles EN 13157 endurance testing