Jawws™ Shear Screw Mechanical Couplers are comprised of a high quality steel body which is installed on a reinforcing bar with TC Bolts. Because the TC Bolts are screwed into the coupler, the studs in the coupler provide a mechanical interlock between the reinforcing bar and the coupler’s inner wall. This is an improved interlock mechanism by creating a stronger interlock in a shower sleeve body. Jawws™ Shear Screw Mechanical Couplers can be installed using an impact wrench provided by BAR-US®.