Open Case Skil 91015 15 Piece Trim Router Bit Set In Case. This is a good quality router bit set that has been well cared for. I don't think most of these bits have been used at all. There's a couple that may have been used a time or two, but it's hard to say. In any case, the set is in excellent condition. The identifying strip tags below each router have some drying glue and are a little loose in spots.