MODEL JS1218/JS1224/JS1228: 
These models are designed for use with trucks, height adjustment is made using the knurled nut and threaded stud. 
MODEL JS302/JS602: 
These models incorporate a lever and ratchet assembly for adjusting the height. 
MODEL JS303/JS603: 
Same as Model JS302 & 602, but these models are newly designed with rubber pads which can prevent the auto body from damage. 
MODEL US1175/US1180: 
*Light weight, slender design makes handling easily, even in close quarter. 
*Quick adjusting spin handle with thrust bearing eliminates wear and provides turning with ease under load. 
MODEL TS1102: 
*This model is designed for supporting vehicle components under the vehicle. 
*Pin positions provide four different height adjustments.