Extension plate allows for added radial clearance. Heavy-duty roller chain can accommodate up to a 7-1/2 diameter shaft.Set comes with two Starrett 81-141J Indicators. Excess roller chain can be secured to the side of the chain clamp. A second shaft alignment clamp can be mounted across from the first clamp to act as a vertical target for face alignment. The item "Starrett S668DZ Alignment Clamp Set With (2) 81-141J Indicators" is in sale since Friday, May 24, 2019. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Metalworking Inspection & Measurement\Indicators". The seller is "djlex29639deals" and is located in Lexington, South Carolina. This item can be shipped to United States.