Librands mirror base. On the ones supplied to adjust the stem arm position needs to be wedged apart by 1.5 mm to lift the pins from the locating holes so to enable the arm to be located in the position required. A printed note came with the bases how to do this. The mirror stem into the arm has a slotted screw bolt to position the mirror stem/ head. Over the many years of ownership and 182,000 miles I have replaces many parts with stainless steel with no regrets and the Librand bases are excellent quality. I have now added two 1.5 mm hard plastic 2 off 8mm strips to my ever growing carry in the car tools just in case.
