Our prescription for cutting through H20 – the flat sides of the Aspirin-Head Jig. These flat sides also permit placement of stick-on decal lure eyes on the jig head. Size 2.5 Stick-On Lure Eyes fit all weights of Aspirin-Head Jigs: Size 4 eyes can be used on 3/16 oz. and above; Size 5 eyes will fit on 1/2 oz. and larger. The Aspirin-Head's barb collar loves plastics.