The On Guard Mastiff Chain Lock is made of 10mm ultra-hardened, titanium-reinforced steel links with a 13mm padlock.

• The On Guard Mastiff Chain Lock is made of 10mm ultra-hardened, titanium-reinforced steel links with a 13mm padlock.
• Includes 5 laser-cut keys, 1 lighted key
• 10mm links with 13mm padlock and includes $3,001 anti-theft protection
• Features a non-slip chain cover and ultra-hardened, titanium-reinforced steel links