General description Enhance your 3D printing experience with the FOR Openbuilds Jod Knob engraving machine 8mm knob handle. This accessory allows you to connect navigation buttons for manual adjustments of your machine's position, making it compatible with all X/Y table settings that utilize built-in positioning screws. Technical specifications Type: 3D Printer Accessories M5 Threaded Hole: 4 Knurled Handle Color: Black Material: Metal Size: Hole: 8mm Hexagon: 3mm Measurement allowed error: +/- 1-3 cm Package contents 1 * Handle 1 * M5 x 4mm Fixing Screw 1 * Wrench