Exterior is static-free black cotton duck and anti-static blue poly end shells inter-locked and riveted to an aluminum frame for maximum strength. Two combo locks, golf grip handle, and giant studs for wearability. Interior features our unique adjustable static-free environment with cushioned separators. Platt cases incorporate Dry Stat/Cryovac EPG 112 humidity independent, amine free static dissipative material and Cancel amine free open cell cushion materials that meet or exceed Military specifications MIL-B-81705, Type II and PPP-C-1842A, Type III. With grounding snap. The number of slots determines the amount of board space available in each case. Has 2 dividers for enhanced board storage.