安全掛鎖

Closed tube-shaped shackle with extra security. Mechanism and all parts of padlock are available. 1:1 Scale is in real dimeio. Compatible with each other lock mechanism and key. The tube can be used by hardening 50 HRC of high-speed steel and filling the hydraulic oil into the tube as the liquids do not compress. This makes it to safety padlock very resistant to impacts, saw and iron shea.