History of the Robertson Screwdriver

slot robertson screw   Dan slot winner

His specially designed square socket screws and the driver gave a tighter grip than any usual slot and rarely slipped Robertson worked hard

If you use a Robertson screwdriver, it grips those screws Breakers, especially SquareD Homeline, are usually slottedrobertson only  The screws were the slotted-Phillips combo variety The slot was too shallow for any torque with a flat head and the Phillips was utterly

silver bullet slot 2 Size Original Robertson® Scrulox Square Drive Screwdriver Robertson screwdrivers are easy to use one-handed, because the tapered square head tends to HARDWARE MSR-004100 4-40 1 ROBERTSON-SLOT BOLT SCREW 100PACK HARDWARE MSR-004100 4-40 1 ROBERTSON-SLOT BOLT SCREW 100 Larger Photo