Baker Dial Depth Gauges has Following Features:Suitable for quick and easy measurements of depths.Base with 80 mm length hardened and ground to a high degree of flatness.Supplied with a set of extension rods for measurement of wide variety of depths.Supplied with Tungsten Carbide contact point for longer life.For the American market, Depth Gauges meeting the requirements of AGD standard available.Baker Dial Depth Gauge, Model no. K158/3, Range: 0-200mm, Resolution:0.01mm, Dial Reading: 100-0, Units/Pkg: 1, Warranty: As per manufacturer's warranty policy.