3pc 38x25mm CNC Solid Aluminum Knob Button for Amplifier CD Player Preamp DAC Volume Control

Monolithic Solid Metal Knob Structure: One-piece machined metal main body delivers solid tactile feedback and stable integral frame to maintain consistent structural form under long-term repeated twisting adjustment Uniform Textured Outer Rim Layout: Continuous processed outer surface reduces surface abrasion traces, with patterned side outline creating reliable hand contact area for steady smooth rotational tuning motion Fixed Shaft Lock Assembly Frame: Standard inner hollow contour matches regular rotary adjusting shafts, relying on built-in locking screw to sustain fixed positioning and avoid rotational sliding displacement during operation Fine Processed Contoured Outline: Fully trimmed smooth border without rough protrusions features neat exterior details to match rotary adjusting positions on sound processing equipment Universal Rotary Adjustment Outer Profile: Standard inner mounting space fits rotary control assemblies of amplifiers, signal adjusting devices and sound effect accessories and other similar audio equipment