Instruct: Classify Amazon reviews into positive or negative sentiment
Query: World's most expensive paperweight

No way this works on any gun, let alone a kimber 1911. The slide clamp block simply has too much vertical play to allow for stabilization of the pistol slide. For a press to work, the slide must be rock solid stable. I contacted Kimber/Meprolight and returned mine. Don't waste your time or money....total garbage!