Use strap wrenches on plastic pipe, filters, or any slick or smooth surface. Strap wrenches work well on irregular shapes, too. Reed’s extra-strong, coated-polyester strap provides slip resistance and durability along with protecting plastic or polished metal pipe from scratches or deformities. SW12A30, SW18A48 and SW24A72 have extra-long straps for increased leverage on large diameters.