once again, aci trumps the competition! the beam clamp shown on the left is an aci model. the one on the right is an equivalent model from cm/little mule. you could buy the cm clamp from your distributor, or you could buy......once again, aci trumps the competition! the beam clamp shown on the left is an aci model. the one on the right is an equivalent model from cm/little mule. you could buy the cm clamp from your distributor, or you could buy acis top quality beam clamp for 37% less! its not a tough call. aci is your best choice for your material handling needs!