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): 685 Radius of Movement(mm): 630 Microfine Adjustment hole diameter: 8mm Dial Gauge is NOT included. Still need an Indicator? Check out our selection here. Arm Dimensions (mm) [see 2nd picture]: L=635 L1=373 D1=24 L2=262 D2=16 Threads [see 2nd picture]: M1=M10x1.25 M2=M8 Need a base for your Fisso arm? You can find them here. If you need an extra large indicator holder arm with a very far reach then the Fisso Classic 6400-63 F 8mm Articulated Indicator Holder Arm is an optimal choice. It can measure work-pieces on large industrial machines because of the longer-than-normal reach. It includes the adjustment (indicator holder), but not a base. Using your Fisso articulating arm is extremely easy. 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.