I designed and built this Quick Change Lathe Turret about a dozen years ago. I used it on an 11" Logan model 1955 right up until I sold the lathe. It is able to index in 30 degree increments and holds 4 tools simultaneously. The available tool holders are: Turning, Facing, Boring, Parting, and V-Block. It took quite a bit of time to design and build but was fun and rewarding.