Square Recess (also known as Robertson®) screwdriver bits are very popular. The head has a slight taper which prevents cam-out and holds the screw more securely.
Sutton Tools Supabit Extreme Impact Bits – Certified ‘heavy hitters’ specifically developed for use with the high-torque output of an impact driver.
Sutton Tools Hex & Square Recess Supabit
$6.95Price
Size
Length
Pack Size