JR CRAWLER’s concept is the straight worm, which push water hard and can imagine worm action in the water easily. Made with heavier soft material. Shape and thickness are not stable from head to tail. So that JR CRAWLER push water hard and its tail vibrate left and right. Also, JR CRAWLER has 4 arms. These 4 thin long arms move like a small worm and get bite from smaller bait fish. The bigger fish come closer to the JR CRAWLER to see what smaller fishes are biting, and they find irregularly moving JR CRAWLER, which is picking by smaller bait fish, and bite it.