With steel rattle inside,can make noise to better attract fish They create life-like swimming actions in water one of the most famous blanks for lure painters Wonderful fishing tool for fishing lovers Unpainted Blank Lures Material: made of duable ABS plastic, sealing materail to prevent water leakage. Lure Blanks Sound: the unpainted lures has steel balls inside, can make noise to attract fish better. Unpainted Fishing Lures Realistic Imitation: these blank crankbaits have vivid swimming action in water, making fishing easier. Handcrafted Lure: easy to custom paint lures for whatever design you want to use, making lures with your own serect colors and patterns.