Non-rotating, blade-type rods Comes with the combination ratchet and speeder for uniform pressure and quicker adjustment 2 1/2" base length 0.45 x 1/8" rod size Adjustable measuring rod Rust resistant Blade moves perpendicularly only, permitting measurement of narrow shoulders without the blade rolling off Ground and lapped precision screw Ground, hardened, and lapped base and rod No-glare finish Base shape design automatically positions fingers so that base is held easily in place.Includes:(3) RodsCase