Edge Independent Product Developers AR-Builder Board Wood 12.5inX9.5inX0.5in AR-BUILDER BOARD. Made with cut outs for you to lay Mil-Spec AR internal parts in and hold them in place a user can utilize the included laminated assembly guide to map out which part goes where. Complete with tweezers and a magnet this Builder Board assists with assembly but also cleaning maintenance and upgrading your AR lower receiver. Non Mil-Spec parts may be used with it but may not fit in the precisely laser-cut holes of the board. Specifications for Edge Independent Product Developers AR-Builder Board: Manufacturer: Edge Independent Product Developers Weight: 0.3 kg Color: Wood Package Contents: Edge Independent Product Developers AR-Builder Board Numbered Assembly Guide Edge Independent Product Developers AR-BUILDER BOARD: Ar-Builder Board Wood 12.5inX9.5inX0.5in