Abstract: A shield adapted to protect an electronic device from electromagnetic interference includes a shielding panel having two board support arms extending from opposite sides thereof. Each board support arm defines an elongate slot therein extending in a direction substantially normal to the panel from a remote end to a proximal end. An expanded hole is defined in the board support arm at the remote end of the slot and communicates with the slot by means of a converging section whereby a mounting extension of a circuit board of the electronic device is received in the slot by being inserted in the expanded hole and guided by the converging section into the slot toward the proximal end thereof. The expanded hole facilitates the insertion of the mounting extension into the slot thus the width of the slot may be dimensioned to securely retain the circuit board without interfering with the insertion of the circuit board. The expanded hole also facilitates removal of the circuit board from the slot.