This padded control surface lock secures flaps, ailerons, elevators or rudder quickly, simply and safely! Pads compress to surface configuration—won’t damage surface finish, fade, chip, or absorb water. Bright Day-Glo™ polycarbonate surfaces and yarn streamer for high visibility. Small (4 in. dia.), lightweight (3 oz.)—they do the job. Made in USA. Manufactured by L W Spiro.