I recently purchased two Go Customs cues, a player and a break cue. These are all-carbon fiber, both handle and shaft. I have the 12.3mm with Kamui-soft tip on the player cue with a radial joint. It plays every bit as good as my Revo and Jacoby BlaCk shafts. These are the most durable cues you will ever use. No need to baby them at all. I would feel safe leaving them in a hot car. Excellent value and excellent Service.