Robertson Square Drill Bit Set (10 Pack

Square drive & Phillips screw with Lube finish Lo-Root Features Type 17 shank slot cuts into material

In 1908, Canadian Peter Robertson invented a square-head screw drive where the driver and the hole had a slight taper There had been other

slot og kulturstyrelsen Do you mean Slot head screws because flat head screws can be philips or torx or anything else Flat head means just exactly that— the top

slot quick hits Improved grip: The square drive of Robertson screws allows for a tighter grip and greater torque, making them less likely to slip or strip the