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 scaleAccurately measures in grains, ounces, grams, & more200-gram max (3086 grains)Accurate .15 grainsLCD display screenBatteries Included