Place washer on Knob; insert through positioning arm; attach wooden spacer; and then screw into Clamp back. Knobs are 2" Diameter X 1" Length. Unlike earlier versions with mild steel hanger bolts pinned through the wood, this new version uses a 1/4":20 hardened socket Head Cap Screw pressed through and bonded to the bolt with Cyanoacrylate. Always use a 1/4" washer with these knobs.
Gazelle Ergo Elan Needlework Stands; Lokscroll Scroll Frames; Book Chart, Tool Tray, & Wooley Yarn Holders; & Magnifer Lights and Stands. Universal clamp with adapter also supports Hoops, Q-Snaps, Stretcher Bars & Rods, and most other Scroll Frames including, but not limited to Handi Clamp, Tommorrows Treasures, E-Z Grip, and other generic frames. Artisan Design Lokscroll is designed for attachment to most needlework stand clamps by it's sidebar(s) only. Not only does clamping to fabric wrapped scroll rods damage the fabric; it can damage the fabric attachment locking mechanism.