Knurled Control Knob for Woodworking Machine with SGS Certification. SGS Certified Quality: Product holds SGS certification ensuring high quality standards. Customizable Design: Offers customized options for length, diameter, and design features. High Temperature Resistance: Engineered to withstand high temperatures without deformation. Chemical Resistance: Features solvent, oil, and grease resistance for durability. Durable Material: Made from engineering plastics with a strong, non-deforming structure. Fast Delivery: Stock available with delivery time of 1-2 days. Precise Tolerance: Manufactured with a tight tolerance range of 0-0.05mm. Versatile Usage: Designed to fix on spindle with pin hole for digital change display.