Solid lock housing made of titanium, a special aluminium alloy, providing maximum security and a low weight. Special steel shackle with nano coating for maximum corrosion protection. Double bolted in all sizes from 30 mm. Precision pin cylinder with chrome plated core and paracentric keyway for added protection against lock picking. All available sizes are suitable for most applications where you need to protect items of medium to high value or where there is a higher than average risk of theft. **Extended shackle.