Description: 【GRBL 5.2 Control Board】:This 3 Axis GRBL 5.2 Controller Board is designed for CNC engraving machines, ensuring accurate and efficient operation with advanced features 【Integrated Drivers】:The GRBL Controller Board integrated drivers reduce chip short circuits and come with built-in heat sinks and a fan for great cooling performance 【Versatile Control Options】: 3-Axis CNC Router Machine Control Board supports for offline controllers and external high power drivers allows for enhanced flexibility, featuring emergency stop, reset switch interfaces to meet various operational needs 【Stable Data Transmission】: Both the data transmission chip and main control chip utilize external crystal oscillators, resulting in more stable operation and improved reliability during CNC tasks 【Application】: The GRBL 5.2 control board suitable for engravers, CNC Milling Machine, and other applications Specification: Material: Metal Size Chart: Motherboard: LxW:12.2cmx8.6cm/4.80inchx3.39inch Package Includes: 1 Piece 3 Axis GRBL 5.2 Controller Board Note: Please allow slightly errors due to manual measurement and different monitors.