We have introduced a special Twisto D-LOCK screwing system for those who like to alternate depths and techniques of hunting but they believe in one lure. The D-LOCK has a firm screw, a larger D-shaped eyelet at the front and a smaller eyelet for snapping the rigs with a treble hook. If you are planning to fish in shallow waters, screw the D-LOCK into your favorite lure, attach the rig with a treble hook and hunt. If you want to load the bait, you can attach any weight to the front eyelet. You can rotate the hook attachment eye by deepening the D-LOCK screw or loosening it. This allows you to stab the treble hook into the belly or back of the lure with a straight direction of string or a fishing line. D-LOCK length is 45mm, width of the screw part is 5mm and the widest part is 13mm long. Package includes 5 pieces.