DE2313609

A tool for screwing headless threaded fasteners comprises a receiver having a threaded hole for threadingly receiving an inner end of the fastener, an eccentric element rotatable on the receiver to exert a force against the inner end of the fastener in a manner jamming together the threads of the fastener and hole to resist relative rotation between the fastener and receiver, and a handle for manually applying rotation to the eccentric element. Once the fastener is jammed within the hole, the receiver can be rotated, thus rotating the fastener. The eccentric element may be arranged to directly contact the fastener. Alternatively, a shiftable element may be interposed therebetween to transmit force from the eccentric element to the fastener. The receiver may be provided with a plurality of holes to accommodate differently sized fasteners.