The Lafayette Skinfold Caliper is one of the most accurate and durable calipers available today. It was designed with the assistance of Dr. Andrew S. Jackson, co-author of the widely used Jackson-Pollock skinfold formulas. Lafayette's unique skinfold design has an adjustable zero-point which allows you to reset the pointer back to zero and a measurement range of 0-100mm. Other skinfold calipers cannot be easily adjusted and need to be sent back to the factory, which can cost $45 or more.