This is a magnetic base AND dial indicator. Features: TEST INDICATOR 1) Body is made of machined anodized aluminum and NOT plastic 2) Vertical lug back configuration 3) 1 inch of total travel with graduations in 0.0005 (that's half a thousandth) per line 4) Accuracy guaranteed to 0.001 per 1 inch of travel 5) Each indicator comes with inspection certificate 6) Spindle rack pinions and gear trains are made of high quality steel components ensuring long life 7) Does not come with plastic case, MAGNETIC BASE 1) Base weighs 3 pounds has a built-in super strong magnet with 176 pounds (80 Kg) of holding power 2) Magnet has an On/Off switch which easily and quickly engages / releases magnet 3) Base has V-groove on bottom for mounting on cylindrical surfaces 4) Fully adjustable chrome plated two-arm design 5) Precision fine adjustment knob for precise positioning 6) Accepts nearly all AGD dial and test indicator mounts 7) Overall height 9 inches 8) The vertical arm extends 7 inches from the base. The cross arm is 6 inches in length 9) Does not come with plastic case