The Taper-Lock Splicing System eliminates the need for a torque wrench. The coupler self-aligns onto the taper-threaded rebar, allowing the system to be hand-tightened. To mechanically splice the system, the couplers utilize a proprietary, tapered thread on the rebar and mating couplers. The Taper-Lock Splicing System is a 160% specified yield system, which exceeds specified strengths of most building codes. Dayton Superior. 800-745-3700.