Mitutoyo Universal Magnetic Indicator Stand This Mitutoyo Magnetic Stands accept all AGD-type dial indicators, test indicators and probes having .375", 6mm or 8mm diameter shanks and/or lug back with 1/4" diameter mounting hole. The On/Off switch offers instant mounting and dismounting without any adverse effect to the indicators or work surface. Mitutoyo Magnetic Stands have 132 Lbf of magnetic force to help prevent damage to indicators and probes due to accidental base fall-over. Features include... 132 Lbf Magnetic Force With Locking Mechanism On / Off Switch 2 Adjustable Arms 5.63" 5.43"