This model of electric hoist is an improved product with some special designs based on the original CD and MD models. It has high temperature resistance and thermal insulation protection, dual limit protection for lifting, and a working level of M6. When the rated lifting capacity is greater than 5t, the electric hoist is equipped with a safety brake on the low-speed level in addition to a working brake. When the working brake fails or the transmission components break, it can reliably support the rated load. When the rated lifting capacity is less than or equal to 5t, the electric hoist shall be designed with a rated lifting capacity of 1.5 times.