Baseline HiRes 6-Piece clear plastic goniometer kit includes 1 each 12", 8" and 6" 360 degree goniometers; 1 each pocket 180 degree goniometer, 360 degree rulongmeter and finger flexion/hyper-extension goniometer. The HiRes design ads a white line behind measurement gradations to make the readings easy to see. Transparent plastic goniometer permits observation of joint's axis of motion, and its range of motion. The head has three scales calibrated to be used with the ISOM (International Standards of Measurement, STFR) system. Arm has a linear scale in inches and centimeters and remains at measurement position until reset. Angle scale reads 1 degree increments.