Square Drive

The Square drive or Robertson system has a tapered square fit and are popular for their ease of use and snug fit. Patented in Canada by PL Robertson, the Square drive fasteners remain one of the most common fastening systems in Canada, and are widely used in decking applications around the world.

Square drive screwdriver bits are prefixed with “SQ”, and packaging will have an orange Square drive icon similar to the one on this page.

DURUM Square drive bits have been specially designed for a tight fit with market leading Square drive fasteners and tested extensively to ensure that they are much more durable than competitive bits, lasting up to 25X longer, and delivering More Torque to the Tip.