Made out of 0.090-in. thick anodized aluminum, the Danray safety scale checks point-of-operation openings. It has a 0.25-in. diameter hole, easy-to-read text and graphics that will not rub or scratch off. Approximately the size of a credit card, the scale can be used in tight, obstructed areas.

Danray Products LLC; 866-482-6807; www.danrayproducts.com