2 x Delrin; 2 x Nylon; 2 x Gels picks. Smaller and a lot stiffer; Jazz Grips are Dava's latest design. Made from delrin; nylon; and our polycarbonate gel; and in a size players are used to for a jazz pick; they combine a sharp tip with our rubber grip. Now get the control and precision needed to perform the fastest runs without the fear of dropping your pick.