Berkley’s Nitro Estuary Pro jig heads also feature an improved mid hook baitkeeper design for ease of rigging and bait retention on all types of soft bait materials. Super strong forged, chemically sharpened Owner Finewire hooks for excellent hook penetration Black nickel coated hooks for added rust resistance Mid hook baitkeeper allows for easy rigging on all types of soft bait material Suitable for a wide range of estuary and freshwater species Available in a wide range of hook sizes and head weights to suit various bait sizes and fishing environments