ELMA 500 configurations of knobs in various styles are available as push-on, set-screw, collet, wing, bell-shaped, aluminum, locking, and specialty knobs. Product series serves the two-communications, medical, industrial, audio, military, and instrumentation markets. Product’s have specialty features such as unique shapes, a soft-touch feel, ergonomic design. The collet knobs provide a more reliable grip on the switch shaft with metal ‘fingers’ that tighten evenly around the shaft. This prevents slippage, and ensures that the shaft will not be marred or damaged, unlike knobs that use set-screws.
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