The Sinclair Case Neck Sorting Tool allows reloaders to sort brass by neck wall thickness for improved consistency in case sealing and an indication of body wall thickness variances.
It accommodates 22 to 45 caliber cases and can be used with 17 and 20 caliber cases using an optional carbide alignment rod, with separate pilots needed for these calibers.
The tool can be paired with a .001" reading dial or digital indicator with a 3⁄8" shank, but is not compatible with .0001” reading dial indicators.