TuxCASE for Beagle Bone is machined from domestic 6061-T6511 extruded aluminum bar stock. After two cnc machining operation with 8 tools, 80% of the original aluminum stock are removed. The clear cover is laser cut from .118" thick extruded acrylic. Eight 18-8 stainless 4-40 round philip machine screws are included for securing the board to the enclosure and for securing the clear top cover. Four additional mounting hole are drilled and chamfered at 100 degrees into the base of the enclosure.