“ Manufacturer: Park Tool / Type: Bike Tool „
"Park Tool 1008C - Spring Linkage Clamp. Tools. Replacement clamps fit frame tubes from 1" to 1-5/16" (25mm to 41mm), allow for cable routing on the top tube, and feature replaceable jaw covers. Fits PRS-6, PRS-7, and PRS-8 stands made before 6/96. Clamp has a recess machined in the "donut". ...."