It is an integral-structured metal coupling with a single spiral slit in the round material. A perfect integrated construction eliminates backlash. Maximum parallel offset 0.25mm and maximum angular misalignment 5deg. are allowed. Due to the stainless steel material, it can be used in any environment. Two fastening methods can be selected, the set screw method ( 3002M and 1441 models) and clamp method ( 3005M model