The key is approximately 5/6 inch wide by 2 inches long. It appears to be nickel-plated. It has a circuit-closing side switch. Backbone pivoting is near the center and all adjustments are quite precise. The knob is concave on top, which makes it easy use. This key is in very good condition and would be ideal for QRP and portable operating! It has an ultra-smooth and feathery light feel to it. It is marked 1 on top of the slightly worn brown knob. Lucky winning bidder pays $5.85 for USPS shipping.