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 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 Clamp holes of Ø4mm, Ø8mm, & 3/8 which allows for the use of most indicators, test indicators and scribers. ECO/WM97+ 70/110 Induc Blowe, 383-700-157 Band: Weil-McLain SKU: 383-700-157 (0 Magentic Base Dial Indicator DASQUA 132 lb Magnetic Power With Fine... Dasqua 1801-1005 Digitales Nulleinstellgerät IP65 Höhe: 50mm 1St The fine adjustment device is heat-treated to ensure stability and durability. 80 kg/176 lb. of holding power Dasqua Super Power Magnetic Base With Fine Adjustment 80 kg/176 lb. of holding power. On/off switch for magnet so it's easy to move the base without the influence of magnetic force. Well selected ferrite permanent magnets with magnetic force greater than calibration value Dasqua Magnetic Bases| Penn Tool Co., Inc