A screw insertion system has a screw having a threaded shaft and a head. Theheadhas a conically tapered outer surface, the taper increasing in distance from acentrallongitudinal axis of the screw from a free end of the head towards a largerdiameter adjacentthe connection between the head and the threaded shaft. The conically taperedhead outersurface has preferably two helically extending partially rounded threads. Thehead has adrive element for engaging a driver. A tubular screw holder has an outersurface and internalbore extending between a leading end and a trailing end for receiving thescrew. The leadingend having a conically tapered inner threaded portion for engaging theconically tapered outerthread of the screw head. The tubular screw holder outer surface having adiameter less thanor equal to the maximum diameter of the conically tapered head.
