Fred Kelly Picks Delrin Slick Large Guitar Picks (24 picks) Heavy Delrin Slick Large Guitar Picks (24 picks) Heavy Fred Kelly's Slick Pick has a flat pick point that enhances smooth strumming This pick is neither big or bulky and is the first pick of its kind that behaves like a flat pick The Slick pick is available in delrin or polycarb materials Delrin is an extremely strong material, and provides a soft and natural sound on the strings