The RCBS Quick Change Powder Drain Attachment made from top-quality steel to ensure a lifetime of quality performance. If you frequently switch between calibers but dislike having to re-weigh powder charges after each and every switch, the RCBS Quick Change Powder Drain Attachment may be just what you need. Use the RCBS Quick Change Powder Drain Attachment to give your RCBS Uniflow Powder Measure all the features of the RCBS Quick Change Powder Measure. Once you make the upgrade, you no longer have to re-weigh your powder charges each time you switch calibers.