E3 CNC Router

The E3 spoilboard bed has 1/4"- 20 inserts. The kit comes with 1/4"-20 screws and wing nuts along with 8 clamps for mounting the workpiece. 

E4 CNC Router

The E4 spoilboard bed has six T-slots. The kit comes with 1/4"-20 screws, t-nuts, and wing nuts along with 8 clamps for mounting the workpiece.