The computer-aided disign of the versatile Big Heat (Hydro Magnum) produces incredibly lifelike action no matter the trolling speed. The realistic holographic vacuum metalization finish is augmented by the over-sized 3D eyes, integral gill plates and etches lateral line. through-wire construction makes this trolling lure extremely durable and the smaller size (4-3/4"/1 - 1/6 oz.) makes Big Heat / Hydro Magnum equally effective when cast and retrieved.