General information on Telescope Mounts: Meade, Celestron, Vixen, and others manufacture a large variety of telescope mounts, both in the azimuth-elevation and equatorial styles. Assembling the mount often requires the use of Allen screws. We can supply knobs to replace these screws in most applications. For example, attaching the telescope base to the wedge usually requires 3/8-16 x 1 inch screws with our "T" style knob. It's easy to order the correct type of knob for your mount. Just measure the diameter and length of the factory screw threads and select matching custom knobs.