Blades and teeth are of HARDOX HB400. The use of high quality materials assures longer life with heavy use. The head is covered by a casing integrally removable for easy access to the flexible hose. Hydraulic tubes are mounted inboard and protected from shock. The polyp grabs are painted before assembly so that there are no unpainted and unprotected areas. Grabs are painted with bicomponent painted for high resistance.