?CNC Expansion Board with Free 20pcs Jumpers?This is the latest version of the expansion board, which can be used for engraving machines and 3D printers. It can drive 4 A4988/DRV8825 stepper motors. The jumper caps are necessary for CNC setups. You do not need to purchase this part extra.
?DRV8825 Stepper Motor Driver w/ Heat Sink?DRV8825 is upgrade of A4988! It is a must-have module for 3D printers, CNCs and engraving machines. The 4-layer PCB board has better heat dissipation performance.
?Mechanical Switch Endstop?It uses a 22AWG wire that can withstand a current of 2A and a voltage of 300V. Better quality than traditional copper wire. It can reach the insulation temperature of 80?. It is not easy to break, and very convenient to plug and remove.
?Reliable Technical Support?We have prepared detailed tutorial, please visit our website( www.keeyees.com ) to get relevant information or can contact us on Amazon, we will send PDF Document to you.