1. Standardization of internal threads at rod ends 2. The operability of the magnetic switch is improved and the position is easy to adjust. 3. Equipped with single earring type and trunnion type swing base 4. The models of rod end mounting parts and swing base mounting parts are set (saving time of ordering cylinders and mounting parts separately) 5. With magnetic switch (CDM2-Z series: CDM2, CDM2W, CDM2K, CDM2KW, CDM2R, CDM2RK, CDM2□P, CDBM2)