Twinfast woodscrews are the most advanced screw in the world.
Twinfast woodscrews have parallel threads that provide almost twice the thread pitch of ordinary wood screws. Twinfast woodscrews have a self centering point - the screws start straight and drive true. Twinfast woodscrews have a cylindrical construction resulting in a paralell core diameter so there is less splitting of timber. Twinfast woodscrews have a relieved shank diameter - where screws usually are not threaded up to the head then the unthreaded shank has a smaller diameter than the thread. The relieved shank stops the stripping of the hole and reduces splitting.
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