Kuman Professional CNC Kit for arduino, GRBL CNC Shield +UNO R3 Board + RAMPS 1.4 Mechanical Switch Endstop + DRV8825 A4988 GRBL Stepper Motor Driver with Heat Sink + Nema 17 Stepper Motor Latest CH340G CNC Shield expansion board Version 3.0 for Arduino Kuman UNO R3 Board, MCU: ATmega328, USB interface: ATmega16U2 with 1.5m USB Cable 4pcs DRV8825 Stepper Motor Driver with heat sinks 3pcs NEMA-17 Stepper Motor 84 oz.in (59 Ncm) 47mm Body 1.8 degree with mounting Bracket Kit DIY CNC Robot with 3pcs Mounting Bracket and 12 pcs M3 Screws 3pcs Endstop Mechanical Limit Switches for RAMPS 1.4 with 3Pin 70cm Cable