Markwell Needle Point Staples For L4 Tacker 1/4", 3/8" or 1/2" (1/4") Markwell Staples for L4 Tacker. For use in all Markwell L4 tackers and MPL4 pliers. L4A-ST: 1/4" Staples L4C-ST: 3/8" L4D-ST: 1/2"