The Carbon Express Gigital Grain Scale is perfect for weighting arrow points nocks inserts fletching or full shafts. Compact lightweight and easy to use this unit is accurate to within .15 of a grain and displayed on a bright and easy to read LCD screen. Compact electronic grain scale Accurately measures in grains ounces grams & more 200-gram max (3086 grains) Accurate .15 grains LCD display screen Batteries Included