RCBS 1010 Reloading Scale has a capacity of 510 grains. Capacity cam be increased to 1,010 grains, without losing sensitivity, merely by adding the attachment weight. In addition, this scale has all the features of the RCBS Model 5*10 scale. (1) Micrometer Poinse for weighing speed and accuracy. (2) Special approach-t0-weight system. (3) Large easy to read graduations. (4) Magnetic Damper. (5) Guaranteed 1/10th of a grain sensitivity. (6) Agate bearings. (7) Anti-tip pan design. When it is not in use, you can store components in the die cast base. A moulded dustproof cover snaps into place to protect your scale.