Long structural repair ties. 12 mm diameter helix. Pack of 10.

Price excl. VAT
Price incl. VAT
(7 items in stock)

Structural repair ties are heavy-duty helical wall ties that reinforce masonry walls. Our long drive-in ties screw into masonry to form a deep mechanical connection. The anchorage needs no construction adhesives. Our one-piece anchors strengthen walls on heritage houses, listed buildings and ancient monuments.

Drive these extra-long ties into pilot holes to fix brick, block and stone walls. Once fitted, the ties increase a structure's tension and shear capacity.

What are 12 mm structural repair ties used for?

  • Re-connecting wall junctions.
  • Pinning masonry arches.
  • Tying thick and rubble fill stone walls.
  • Stitching cracked corners.
  • Reinforcing parapet walls.
  • Re-coupling buttresses
  • Securing stone quoins.

To install the heavy-duty ties, drill deep pilot holes. Use 8 mm pilot holes for tying soft to medium-strength masonry. For more challenging materials, use 10 mm bits. The special SDS setting tool drives the ties into brick or masonry walls.

The tying system is at least ten times faster to use than grouted pinning systems. The insertion speed offers outstanding labour-saving costs. 

What are the benefits of using the 12mm diameter helical ties?

  • Temperature tolerant insertion, including in sub-zero conditions.
  • No material compatibility issues with old buildings with lime mortars.
  • Less disturbance to buildings than with any other deep pinning system.
  • Longer and stronger anchorage than any other helical wall tie.
  • Rapid and cost-effective fixing rates.

Our 12 mm diameter structural wall ties are available in 316 marine-grade stainless steel. The ties come in lengths of 910 mm (36 inch) to 1670 mm (66 inch) in 150 mm (6 inch) increments. They are twice as strong as any other spiral wall ties of similar design.

Buy the unique Thor Helical structural repair ties at trade prices.


Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alternatively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

It is important that the customer ensures that all the delivery details are correct and that the customer or someone acting for the customer is able to sign for the delivery. Twistfix accept no liability for failed deliveries as a result of incorrect delivery details or the absence of any authorised signatory. Twistfix will attempt delivery to the recipient between the hours of between 8am and 6pm. If no one is available to receive the delivery an attempt may be made to leave the item with a neighbour. Alternatively the carrier may return the item to the sorting office and leave a calling card at the recipient's address to advise of the attempted delivery. It is the responsibility of the customer to arrange to collect the item from the depot or to arrange re-delivery with the carrier. Further information regarding Delivery can be read at our Terms & Conditions.


Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.