Improving underwater vision using confocal imaging

A plastic screwstrip has a holding strip carrying a plurality of screws in a side-by-side relation as adapted for feeding, into an autofeed screwdriver. To assist in identifying which of two distal ends of the screwstrip are to be fed into the screwdriver and to assist in guiding the entry of the holding strip therein, a guide section of the holding strip forward of the first screw to be driven is provided at its front lead end with an arrow shaped forwardmost portion.