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Strong, versatile, and built to last, this Lockgives you the confidence to lock up in tougher environments — and the flexibility to secure your ride exactly the way you need.
Strong, versatile, and built to last, this Lockgives you the confidence to lock up in tougher environments — and the flexibility to secure your ride exactly the way you need.
On Guard

OnGuard 8019 Mastiff Chain Lock

£80.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

Returns Policy

Your statutory rights are not affected by our Returns Policy. To the extent that any provision in our Returns Policy conflicts with your statutory rights, your statutory rights will prevail and the particular offending provision in our Returns Policy will be deemed inapplicable.

Returns (refunds and exchanges)

If you are unhappy with your item, please let us know. Our Returns Policy gives you 30 days to return or exchange an item bought with a valid receipt. If 30 days have gone by since your purchase, we cannot offer you a refund or exchange.

To be eligible for a refund or exchange, goods must be returned in a re-saleable condition. That means your item must be unused and in the same condition that you received it. The item must be in the original packaging and returned with any accessories, labels and “free gifts” or bonus items.

To complete your refund or exchange, we require a receipt or proof of purchase. Please do not send your purchase back to the manufacturer.

Under the Consumer Rights Act you have an early right to reject goods that are unsatisfactory quality, unfit for purpose or not as described, and get a full refund.

But this right is limited to 30 days from the date you took ownership of the goods (this could be the date of purchase or the date the goods were delivered to you - whichever is later).

After the initial 30 days, you can't demand a full refund in the first instance, but you still have the right to a repair or replacement

Refunds (if applicable)

Once your returned item is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 calendar days. If you paid for standard delivery of the goods, the cost of standard delivery will also be refunded.

There are certain situations where only partial refunds are granted (if applicable):

  • Books or other paper products with obvious signs of use;
  • Any item not in its original condition, which is damaged or missing parts for reasons not due to our error; and
  • Any item that is returned more than 30 days after

Late or missing refunds (if applicable)

If you haven’t received a refund yet, first check your bank account again.

Then contact your credit card company, it may take some time before your refund is officially posted.

Next, contact your bank. There is often some processing time before a refund is posted.

If you’ve done all of this and you still have not received your refund yet, please contact us at

Phone 01704 510850

Email contact@powerstation-ebikes.co.uk

Sale items

We do not offer refunds for sale items, unless they are faulty.

Exchange (if applicable)

We only replace items if they are defective or damaged. If you need to exchange an item for the same item, please send us an email to contact@powerstation-ebikes.co.uk and post your item to – Powerstation Electric Bikes Limited, 25 Kingsway, Southport PR8 1ND

Gifts

If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.

If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and they will find out about your return.

Shipping

To return your product, please mail your product to: Powerstation Electric Bikes Limited, 25 Kingsway, Southport PR8 1ND with your details and reason for returning.

You will be responsible for paying for your own shipping costs for returning your item, unless the item is faulty. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund. Depending on where you live, the time it may take for your exchanged product to reach you, may vary. If you are shipping an item over £50, you should consider using a trackable shipping service or purchasing shipping insurance as we cannot guarantee that we will receive your returned item.

Right to cancel

In addition to our Returns Policy, under the Consumer Contracts Regulations, you have the right to cancel your order up to 14 days from the day you receive your goods if you are an online, mail or telephone order customer. You then have a further 14 days from the date you notify the retailer of your cancellation to return the goods.The refund will include any standard delivery charges paid. You will be responsible for the cost of returning a cancelled order to us.

To exercise your right to cancel follow the steps below:

Contact the store on 01704 510850

Or, email contact@powerstation-ebikes.co.uk

We will refund to you the price paid for the items and (unless you did not pay for delivery) the delivery charges that you paid up to a maximum amount of the cost of our standard delivery option. You will be refunded to your original method of payment within 14 calendar days of our receipt of the cancelled items or, if earlier, within 14 days from the day we receive proof of return from you. If we do not receive the cancelled items back, we may arrange to collect them from you at your cost.

532205442

OnGuard 8019 Mastiff Chain Lock

Season:2026

Brand:On Guard

Code:ON-28019-5

If you want serious, flexible protection for your bike or powersport vehicle, the OnGuard 8019 Mastiff Chain Lock is built to deliver strength where it matters most.

This heavy-duty security system pairs a short-shackle Boxer U-lock with a 3.5-foot titanium-reinforced hardened steel chain, giving you the best of both worlds: the strength of a U-lock and the versatility of a chain. The 10 mm hexagonal steel links are designed to resist cutting and prying, making this lock a dependable choice for medium to high-crime areas.

At the core of the lock is the X4P Quattro Bolt Locking Mechanism, which secures the shackle at four points for enhanced resistance against twisting and forced attacks. The advanced Z-Cylinder tumbler adds another layer of protection by resisting bumping, picking, pulling, and drilling attempts.

Need flexibility? The Boxer U-lock can also be used on its own as a disc lock, making the Mastiff a great option for motorcycles, scooters, and bikes that need adaptable security.

Thoughtful details make it tough on thieves while being gentle on your ride:

  • Titanium-reinforced hardened steel chain links for superior strength

  • Protective chain sleeve that guards your paint and features an embroidered logo that won’t wear or flake

  • Co-molded crossbar cover and double-protected finishes to prevent scratches

  • All-metal endcaps for added durability against drops and impacts

  • Automatic keyway cover to keep dirt and moisture out

  • Five laser-cut keys included, including one with a built-in micro-LED for easy unlocking in the dark

Strong, versatile, and built to last, the OnGuard 8019 Mastiff Chain Lock gives you the confidence to lock up in tougher environments — and the flexibility to secure your ride exactly the way you need.

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