To turn on the LED flashlight on your knife, simply unscrew the top part of the light and remove the LED; Take the batteries out of the light and remove the small plastic disc from the batteries; Reinstall the battery negative side up and screw the LED light back on until the light turns on The blade is deployed manually using two ambidextrous thumb studs and is secured open with a liner lock mechanism Half serrated with a black and silver two tone blade measuring 3.25 inches Black aluminum handle with Sheriff silver logo 8-inch total length with a 4.5-inch closed length