Lee's Safety Scale is reliable, very accurate and simple to use. This is the only scale that will never get out of adjustment. The beam is made from a very tough phenolic, the same type material used on table and counter tops. Phenolic is tough but, like glass, it can't be bent. Even if dropped you can feel confident that if it did not break it is still accurate. The Safety Powder Scale is sensitive and readable to 1/20 grain.