Abstract: A tool for installing an alignment pin assembly that includes a bolt with a hexagonal socket at one end, a locking nut that must be tightened on the bolt while the bolt is held against turning, and an adjustment nut which may have to be turned slightly relative to the bolt and locking nut. The tool includes a first nut engageable socket for engaging the locking nut, a key extending along the axis of the socket and slideable thereon to engage the hexagonal socket of the bolt, a second nut-engageable socket rotatably mounted about the first one for engaging the adjustment nut, and separate handles for turning the first socket and preventing turning of the key.