This patented design uses pure original plated spring steel frame which won't rust, corrode or break under normal use. The net is adhered to the frame with our patented method and has a protective vinyl tubing around the frame that can be replaced when worn. The square 8" (SS8) , 16" rake (SS16) and 16" coarse mesh rake (SS88) come with a replaceable leafing edge. The SS4 has a pocket in a square frame and the SS10 has a 10" pocket in a rake style frame.