Magnetic Base, For Indicators, 3/8 in and 6/8mm Stem Hole Diameters, 6 In Rod and Clamp Accept all dial indicators and dial test indicators. The ON-OFF switch offers instant mounting and dismounting without any adverse effect to the indicators or work piece surface. FULL SPECIFICATIONS Case?56AAL625 CATEGORY ID?Precision Measuring Tools GROUP ID?Other Small Tools INDIVIDUAL OR SET?Individual MECHANICAL OR DIGITAL?Mechanical PRIMARY (OD) CONTACT POINT MATERIAL?Hardened Steel Product Type?Indicator Stand SHIPPING HEIGHT INCH?2.8 STEM DIAMETER?????8mm*, ????9.53mm (3/8??) SHIPPING WEIGHT LBS?3.2 SHIPPING WIDTH INCH?3.6 THIRD DRILL DOWN?Stands MITUTOYO CATALOG PAGE NUMBER?F-61 PRODUCT MANUAL?99MBH006B_Magnetic Stand7010S-10_7011S-10 RANGE STEP?NA PRODUCT MANUAL?99MBH006B_Magnetic Stand7010S-10_7011S-10 SHIPPING LENGTH INCH?10.1 US Harmonized Tariff Schedule?9031.80.8085