Standard Pack = 1 piece(s). Type = Digital Depth Gage ; Range = 0 To 31 Inch ; Accuracy = 0.0024 Inch ; Resolution = 0.0005 Inch ; Made Of = Oxide Coated Aluminium With Double Inner Prismatic Guide Ways ; Bases Made Of = Hard Anodized Aluminium, Which Are Easily Interchanged ; Includes Three Base Attachments = 150/ 300/ 450 MM ; Includes Two Contact Points = Rotatable By 90 Deg : 3/5 MM ; Features = Electronics Feature On/Off, Floating Zero And Direct Inch/ MM Conversion, 0.0005 Inch Resolution And Repeatability, Uses 1 LR44 Silver Oxide Battery, Includes A Fitted Case, Instructions, 2 Spare Base Screws, 2 Hex Wrenches And Test Certificate ;