The MS9212 offers pro-level features including a 10-pound 12? base that provides unmatched stability to handle the heaviest microphones and longest boom arms. Its oversized shafts measure 1-1/8? in diameter for the a lower shaft and 7/8? for the upper shaft. A reducer at the top of the upper shaft makes the MS9212 compatible with all standard 5/8?-27 threaded mic clips and boom arms. A heavy-duty mid-point clutch is designed to act as a brake on the upper shaft so even when loosened it prevents the shaft from crashing down while adjusting height. To aid with precise mic positioning the upper shaft features an oversized knurled locking washer that keeps any attached mic clip exactly where desired. Connection of the lower shaft to the base is via a solid steel machined lug with M20 threading and locking washer. This course threading provides an excellent combination of fast assembly and secure connection while extending thread wear far beyond fine-thread designs. Finally superior stability is achieved thanks to a sleek embossed base with shock-absorbing rubber pads.