Important: Lead time on this item is currently about 3 weeks. Please contact us for the most accurate info. Features: Easy, fast & accurate positioning. Precise microfine adjustment with dovetail and mounting hole. One knob allows for simultaneous tightening / releasing of all 3 joints. Uses a maintenance-free, mechanical central tightening system. Quick, stepless lock. High-quality chrome plated alloy. Swiss made. ROHS and REACH compliant. Overall Height(mm): 310 Radius of Movement(mm): 200 Microfine Adjustment hole diameter: 3/8" Dial Gauge is NOT included. Still need an Indicator? Check out our selection here. Arm Dimensions (mm) [see 2nd picture]: L=197 L1=112 D1=10 L2=85 D2=9 Threads [see 2nd picture]: M1=M8 M2=M6 Info on Base: Holding Power (n): 800 Dimensions (mm): 60 x 50 x 55 Thread: M8 The Fisso 2200-20 F + M 3/8" Articulated Indicator Holder Arm & Switch Magnet is an affordable & accurate option. It's great for measuring tasks required by a wide variety of machining jobs. It includes the adjustment (indicator holder), and base so you' don't need other accessories to start using it. Using your Fisso articulating arm is simple. Attach your favorite dial indicator to the adjustment, position it, twist the knob, and you're ready to start measuring. Still have questions? You can contact us, or take a look at the Fisso Resource Center.