Fits like a mouse in your hand to bridge a pool que. Allows a natural bridge with improved consistency. It took close to 35 revisions over 6 months to make it small and to fit into a natural application. It works for either hand. The design allows to go from the felt and onto the rail with ease. It is legal for competition. You should still ask. There is also the two of the most common radii to monitor the tip. My first testing was at a friend's house and I won the first 7 games and it wasn't even noticed. It's even so small you can reach into a pocket to extract the balls. I put Teflon tape on the wear points. I also tried hockey stick tape too. Both tapes worked well. Print time is about 1 hour and is 6mm thick. I've only seen one similar tool made for this and it was on Amazn.