The Owner Beast Hooks with Twist-Lock and Centering-Pin Spring (CPS) are designed for weedless-style rigging of larger plastics like big swim baits. The Centering-Pin Spring attached to the hook eye, baits can be permanently secured by inserting the pin in the center of the nose of a soft plastic, which can then be screwed onto the Twist-Lock coil spring to rig perfect every time! Different Size springs are matched to hook size to maximize holding power.