Body Fat Caliper
Since most fat on the body is located directly under the skin, a very efficient and practical way to measure your body fat percentage is through skin-fold measurement. This is the scientific approach to the time honoured "pinch an inch" method.
The Element Fitness Body Fat Caliper is a precision instrument that has shown in clinical trials to be closer in accuracy to the "gold standard" of underwater weighing than any of the more elaborate methods of measuring body fat (without the inconvenience, expense, trained personnel and lack of privacy those methods entail).
Comes packed with a user guide including unique instructions to measure body fat % as well as measurement charts for males and females.