The OnGuard Mastiff chain lock offers great security in high crime areas with oversized titanium reinforced hexagonal links. These links are tough against saws, bolt cutters and prying attacks.
OnGuard’s Double Bolt Mechanism is strong against picking and drilling. Chain bike locks like the Mastiff give you more flexibility to lock your frame to different locations.
A durable chain cover prevents scratching on your frame while 5 keys mean you’ll always have a spare.
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland UK, regardless of the size and on all orders over £12.
Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.
Please note that Pre-Order dates can sometimes change due to updated stock information.
Click here for more UK and international delivery information.
It's easy to return a product with our 365 day, hassle free returns.
We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).
Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.
If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.
For more information please visit our Returns & Warranty page.