This spindle mount takes the "quiet cut" spindle supplied by shapeoko. Its stronger than my other one, by allot! Its thick and strong/rigid enough to be a permanent mount for the spindle or at least to hold the spindle while you CNC cut a spindle holder of your own! M5 bolts and nuts. Hex Cut Extrusion to Capture m5 Nylock Nut. 4 X M512mm, 4 X M520mm, 8 X M5 Nylock Nuts. Files are STL in mm for direct printing, also included an Autocad Inventor part file . Print it on its side for best strength! Also so there is not heaps of support material to cut away!Drew it up in Inventor, Printed it in ABS, Bolted it on.