Features: NOTE: Current lead time on this item is about 2 weeks. 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. Pre-tensioning: With this model you can lock the bottom portion of the arm in place even if the dial is turned. It's great for taking multiple measurements on the same machine, and for protecting the gauge when the dial is twisted to release the arm. High-quality, red anodized, light alloy. Swiss made. ROHS and REACH compliant. Overall Height(mm): 365 Radius of Movement(mm): 280 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=280 L1=170 D1=16 L2=110 D2=10 Threads [see 2nd picture]: M1=M8 M2=M6 Info on Base: Holding Power (n): 300 Dimensions (mm): Ø 88 x 27 Thread: M8 The Fisso Strato M-28 F + V 3/8" Articulated Indicator Gauge Holder Arm With Vacuum Base is a solid choice for a job that demands accurate and easy measurements. The indicator holder and base are included so you don't need to buy extra attachments. Using your Fisso articulating arm is easy; add a dial indicator, put it into position, 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.