The Henderson Precision Gen 4 Powered Case Trimmer features interchangeable collets and cutters (sold separately) to trim most standard cartridges. The single speed 115v DC motor powers the trimmer at 1800rpms to get the job done fast, no matter how much bras you have to trim. FeaturesWill repeat to within 0.002" with same brand brassBrown & Sharpe-type colletTaper-Lock cutter 14deg inside chamfer 30deg outside chamfer