The commercial frog stickers I've seen are rolled steel sockets with welded 3-5 tine pitchforks. With practice they are effective for fish. Frogs are actually easier caught with a treble hook baited with bright red cloth and dragged toward you until snagging is possible ( information from Chris Janowski of WSI ). I've made fishing spears by simply wrapping 3 long curved, sharpened and barbed lengths of steel to a shaft. Just scribe 3 channels to help orient the barbs and lash with paracord or wire.