Forster Products Neck Tension Gage Kit Features The Forster Neck Tension Gage Kit gives reloaders a fast way to inspect case necks after sizing and before seating a bullet. Each gage consists of four stepped diameters that increase in size toward the handle with every diameter etched into the metal for easy reading. The reloader simply inserts the stepped end into the case neck and slides it in until one diameter achieves a slip fit which tells them the exact inside neck diameter they are working with. That reading lets a shooter fine-tune case preparation so every seated bullet releases with consistent predictable tension. Beyond measuring tension the gage doubles as a way to catch problems before they reach the press. Sliding the tool into the neck also reveals whether a donut has formed at the neck-shoulder junction a defect that can throw off seating depth and accuracy if it goes unnoticed. Because this kit bundles all five available calibers together a reloader working across multiple cartridges has every gage they need in one package rather than buying each size separately. At just over a pound the kit is compact enough to keep on the bench or in a range bag for checking brass between loading sessions. Forster Products Neck Tension Gage Kit Specifications Manufacturer: Forster Products Model: Neck Tension Gage Kit Type: Case Neck Gauge Calibers Included: 5 Pieces: .224 .243 .257 .264 .277/.284 .308 .338 Weight: 1.19 lbs Available At: GrabAGun