Tri-Knobs 4-Pack by Needlework System 4. The most versatile stitching stand on the market! Tri-Knobs are used on all System 4 stands, to hold attachments to the base Knobs are made of high quality plastic with metal fittings inside Each knob is 1.25" wide and 7/8" high This is for one set of four (4) Tri-Knobs The Tri-Knobs are easy to turn, tighten and loosen, making adjustments a breeze Proudly made in the USA All attachments use the tri-knob that comes with the stand to attach onto the stand Extra knobs - for your stands, the Radius Arm, the Q-Snap holder, the Belt Scroll Frame, Dowel Sets (not used on a stand), and the Light & Accessory Holder Each System 4 component is sold separately - so you can order exactly what you need Once you choose your stand, choose your canvas holder, and your accessories System 4 products are in stock and ship directly from our Raleigh, NC retail location
