This is a rotatable build plate holder for the elegoo Mars. it was made to hold the build plate to aid in part removal Its spring-loaded so you can rotate into different orientations ****Required Parts***** 4 x Wood screws 1 x 9/32 by 1/2 Spring 4 x 1" 8-32 screws with nuts, available everywhere, even Walmart 1 x M4 washer 1 x 1" aluminum square tube from Lowes or Home-depot 1x M4x25 countersunk screw 1x M4 nut None of the parts requite support when printing The base can be mounted to a tabletop or a block of wood