Grip Engineers Private Ltd. Offers Jib Crane with Rotating Boom. Grip Engineers Private Ltd. Is an ISO 9001:2000 certified company. Jib Crane with Rotating Boom has a boom attached to a mast that rotates which is further held in a vertical position by floor and ceiling mounting or by wall bracket mounting. However, the most widely used design is the Self-Supported type at the base. By handling material to and from machine tools, forging presses and other production machines, Jib Cranes with Rotating Boom relieve congestion and increases production, with only a relatively small investment. These cranes relieve the overhead crane of much work and reduce waiting time.