Perf-O Grip Walkway Grating Perf-O Grip Safety Grating offers a unique surface of large debossed holes and perforated buttons providing maximum slip protection and performance under practically all conditions and in every direction. Parameters and Specifications for Per-O Grip Strut Gratings Perf-O Grip is a plank metal grating offering a slightly less aggressive surface than Grip Strut.Per-O Grip is made with a round hole pattern Perf-O Gripâ??s light weight and resilient design makes the product easy to handle and install producing a very economical installed cost. Standard channel width:2-Hole Plank,3-Hole Plank,5-Hole Plank,6-Hole Plank,10-Hole Plank,13-Hole Plank,16-Hole plank,etc. Standard Channel Length:10 and 12 Normally Used Material:Aluminum,Stainless Steel,Galvanized Steel,etc.