Smooth & Reliable Control: Enhance your 20k drill with this B20K control board speed knob, designed for smooth and accurate speed adjustment during drilling tasks. Construction: Built from long-lasting materials, this b20k control board speed knob provides a sturdy and reliable solution, ensuring extended use without frequent replacement. Easy to Install: Comes with washers and nuts for a quick and simple setup. Swap your old knob with this drill replacement part in minutes and get back to professional care. Consistent Performance: Engineered for stability, this replacement knob maintains precise speed regulation, helping your pro 20k knob deliver professional results every time. Value-Packed Set: Includes 2 replacement knobs with accessories, making it a practical backup solution for salons and home users who rely on their up200 drill handpiece. Color: As Shown Material: Metal Package Contents: 2*pcs 20k nail drill Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.