A bend at the top of the hook where it is connected to the fishing line ( is not included).While regular hooks can be effective, It help catch a greater of bass fish.The way they function is by turning directly in to the fish mouth when the hook is set.Product Name : Fishing Line to Hook ConnectorColor : Dark GrayDimension : 27 x 5mm/ 1 x 0.2 inch (L*W)Ring Diameter : 2mm/ 0.078 inchMaterial : MetalWeight : 2gPackage : 10 x Fishing Line to Hook ConnectorNote: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.