#1 x 1" Frearson Driver Bit Wire Detent

Frearson Recess fasteners are often mistaken for Phillips Recess fasteners since they are very similar in appearance. The major difference is that a Frearson recess features parallel sided wings, whereas the wings on Phillips driver bits are beveled. Because the driving surfaces are parallel, any Frearson driver bit will function properly in any size Frearson recess screw. Size #1 bits fit #5 and smaller screws.