Dasqua 6 Piece TiN Coated 5/16 To 6" Telescoping Gage Set Durable action (self-centering) for quick checking of inside measurements. Great tool for easy and accurate measurements of the true sizes of holes and slots. TiN coated with a satin chrome finish for long tool life. Constant spring tension for uniform feel & smooth operation. Rigid handle with self-centering feature so that the contact plunger automatically self-centers at all times and in all positions. Contact point ends are hardened tool steel and precision ground on a radius of the smallest hole the gage will enter. Includes fitted case.