The Accu-Arrow Scale by October Mountain Products is a high capacity and high accuracy digital arrow scale. It Features an exclusive arrow/accessory holder that enables you to weigh arrows and points while holding the object in place. This conveniently weighs in grains only, and has a 3086 grain max at 0.2 grain accuracy. Operates on two AAA batteries(included). Size: 4 3/4"L x 3 1/4"W x 15/16"H.