all it is a piece of wood going from your door to a block on the floor. Could be 2x4. get a 5 foot piece of 2x4 and about two more feet to screw to the floor. You might have to tie wire the kicker to the door so it doesnt move if it got kicked. ALSO this is important. Make sure you cant get in threw your windows. Grab a thin piece of wood and cut it to a lenght that would fit in your window frame to prevent your window from being opend.