Jim McLean and his son Jon worked with EyeLine Golf to develop the Slot Trainers – two pieces that help with Path and Face. The set consists of the ball path trainer and putter path trainer. The Putter Path Trainer is a template to help you set up your ideal practice station. Set up your ideal putter path. The system contains a ball path trainer, putter path trainer and carrying bag. Fits easily into your golf bag to get you ready for your important putting practice and warm up.