The Checklock SQ® has two handles that, when squeezed together with the fore finger and thumb, loosen the two coils enough to allow room for two adjacent nuts to pass through. When the handles are released, the coils tighten and grip onto the wheel nuts to retain them which reduces the likelihood of wheel nuts loosening, or backing away from the wheel hub completely. The product is durable and reusable, with no fitting tool required which dramatically reduces maintenance time and costs. The Checklock SQ® wheel nut retainer is a new product that supersedes the Checklock®, previously made from a circular shaped steel material and now made from a square shaped steel cross-section.

The primary functions of Checklock SQ® are to:
✓ Retain wheel nuts to lower the likelihood of them loosening
✓ Greatly reduce the likelihood of wheel nuts backing away completely from the wheel hub
✓ Provide a clear visual commitment to roadworthiness and professionalism to other road users and transportation associations such as DfT, VOSA and FTA
✓ Can comfortably incorporate a wheel overheating indicator function

The primary benefits of fitting Checklock SQ® are:
✓ Improved safety of fittings where nuts are a critical structural component, such as on vehicle wheels and industrial/commercial structures
✓ Much improved vehicle safety through avoiding potentially severe road acci- dents resulting from loose wheel nuts
✓ Simple to fit, with no additional tools required, to help the reduction in main- tenance time and costs
✓ Reduction in vehicle downtime
✓ Cost effective solution to implement
✓ High quality premium stainless steel reuseable product