The Hornady Precision Reloaders Kit has all of the necessary tools for reloaders to create out the most consistent and accurate reloads possible. This kit includesHornady Lock-N-Load Concentricity Tool that identifies and eliminates bullet runoutHornady Cam-Lock Case Trimmer trims cases to the correct length and is adjustable to 1/1000" without moving the case.Hornady Cam-Lock Case Trimmer Power Adapter allows reloaders to attach a battery powered screwdriver to drive the case trimmerHornady Lock-N-Load OAL Gauge Curved designed to determine the proper bullet seating depth by accurately measuring the rifle's freebore increasing the accuracy of the rifleHornady Lock-N-Load Bullet Comparator Set is used for measuring and comparing bullet seating depth from the base of the ammunition to the bullets ogive Hornady Lock-N-Load Headspace Kit which measures from the case head to datum line on case shoulder to measure if brass is being resized correctly. Works with 17 caliber cartridges...