Having the same improved spring-loaded universal shell holder of the manual trimmer, the Power Case Trimmer features a high torque low RPM motor. The self-feeding spring-fed cutter makes case trimming easy and accurate. No pushing or feeding pressure is required, leaving your hands free to do other case preparation tasks such as chamfering, deburring or primer pocket cleaning. The positive locking handle and integral power switch makes operation simple and safe. RCBS has also added a manual on/off switch to aid in setting case trim length. NOTE: Cases with rim diameters larger than .625 must be trimmed on the 90352 High Capacity trimmer.