Constructed of 304 stainless steel for superior corrosion resistance and durability. Designed with a slotted plate that fits over a fixed post they are used in conjunction with a padlock to prevent removal when locked. Installs with eight #6 FH fasteners (not included). A 4-1/2" B 3-7/8" C 1-1/16" D 11/16" E 5/16" Fastener #6 FH