Accurately measure skin fold thickness utilizing one to calculate bodyfat levels using measurements from front of upper arm, back of upper arm, waist and upper back.The included instruction manual provides male and female charts including frame size, bodyfat calculations for 1, 2 or 4 test locations and height/weight, along with information on how to determine muscle loss or gain, how to determine frame size and how to find a persons weight for a desired bodyfat level._x000D_Features:~ Calibrated jaw width can measure up to 80mm_x000D_~ Easy to use pistol grip trigger_x000D_~ Dual springs for consistent measurements_x000D_~ Made of durable, ABS plastic material_x000D_~ Quick, accurate results in 3 easy steps_x000D_Specifications:~ Size:27.5x24.5x1.5cm_x000D_~ Colour: black _x000D_~ Measurement range: 0 to 80mm_x000D_Package Includes:~ 1 x Skinfold caliper_x000D_~ 1 x Instruction manual