Dasqua Standard Magnetic Base 80 kg/176 lb. of holding power. 150° v-grooved base can be placed on the cylindrical surfaces as well as flat surfaces to allow indicators to be placed in multiple positions. Well selected ferrite permanent magnets with magnetic force greater than calibration value. On/off switch for magnet so it's easy to move the base without the influence of magnetic force. Solid structure with electroplated surfaces and ground end-faces. Clamp holes of Ø4mm, Ø8mm, & 3/8" which allows for the use of most indicators, test indicators and scribers. The fine adjustment device is heat-treated to ensure stability and durability.