The Best Grip 3000B tungsten head stud. A more aggressive prominent tipped stud. It will cope with extreme terrains where more traction is essential. Biting into the weed, gripping the barnacle clusters, your confidence is increased knowing the studs are doing their job locked into your boot sole.. Fit between deeper tread patterns or into deeper recessed wader screw slots. The 3.5 mm tip will make contact with the ground beneath your sole but not detract from the grip pattern on your boot. The stud requires a custom adapter to fit.