The Fender Mojo Grip™ is a nitrile rubber grip that provides improved gripping surface and added thickness to a 351 shaped pick. The grips come with a Dura-Tone Delrin pick already in place. The best part of the Fender MojoGrip™ is that the grip is separate from the pick. If you wear out or break your pick, simply carefully slide the pick out of the grip and replace it with another pick.