These clamps are bad for bones, very well constructed and have a few features I like. First, they have a thin thread that allows them to be tightened more tightly. Second, they have a square section that uses the T-handle with a wrench. Third, they are forged and durable. and the turntable looks solid like it will last a long time. If you need a great clamp and are tired of the bent, welded, abused junk that some idiot used a 5 foot pry bar on because they were too lazy to find the right tool…