Quik Drive CB3BLG158S Fiber Cement Board 1 5/8-Inch Screw with type 17 Point Coarse threads with type 17 point C-3 Mechanically Galvanized Nibs under head for countersinking Used in Quik Drive Tools PROLDH, PROCGB. Free Bit in every box of screws #3 Undersized square drive BIT3SU