Magnetic Base Indicator Holder This Magnetic Stand Indicator Holder will work with both Dial or Test Indicators. This will hold Test Indicators with a dovetail clamping, and Dial or Digital Indicators by clamping on to a 3/8" or 8mm diameter stems, or a lug back. Features include... Magnetic Base 220 lb holding force Rotary On/Off 2.16" Base Height 2" Base Width 4.61" Base Length 13.78" Rod Length 8" Post Height