The Double Alpha compact Golden 20 Pocket Gauge is machined from top quality aluminum and anodized in gold color. The gauge pockets are finished using Clymer chamber finishing reamers, to ensure absolute correct dimensions. The Golden 20 Pocket Cartridge Gauge is small enough to fit into any range bag or tool box. A great deal of thought went into the dimensions of the block: The bullet pockets were positioned as tightly together as possible, in order to allow dropping 2 or 3 bullets in at a time, in the same way you would fill your ammo boxes. The height is purposely cut shorter than other gauges, so that the tip of the bullet head sticks out. If a bullet gets stuck, as reloaded ammo often does - you can simply push it loose from below with your finger, without having to pick up a tool. The twenty pockets allow you to drop in rounds much faster than possible with a single gauge, cutting your testing time down to less than half.