The screws are unique in having a hole drilled down through the drive recess into the shank of the screw,
which allows for 'long-stem' cover caps like to achieve excellent grip in the 'head-hole' - even when the screw has been driven deeper into the board.
screws are size M4.5 (9 gauge) and come in lengths of 35mm and 50mm
Once Fitted with your Choice of coloured caps they are ideal for Sign Fixing applications,
They will not fall off in the sun as they are pressed deep inside the screw