Trim Head Square Drive Screw: A countersunk flat head with a width 1/3 less than a standard bugle head drywall screw. This screw has a recessed square drive, fine twin fast thread with an extra sharp point. This minimizes the chance of splitting the wood and is good for attaching trim or application where a small head is needed. These screws are not coated and are for interior use only. They are black in color, like drywall screws.