Model makers, jewelers, and precision workers - these L.S. Starrett pin vises are seriously professional tools! The 240A model features a special tapered collet that provides maximum clamping surface for holding small drills, pins, or other stock securely. What's really clever is the smooth section on the handle - this allows you to hold the vise in machine chucks or collets for more precise work. The handle has a hole through its entire length too, so you can accommodate longer pieces of stock and grip them close to the working end. The end of the handle is knurled and has a smaller diameter than the chuck, which makes opening, closing, and rotating the vise super easy and fast when you're doing detailed filing or forming work. The heavy nickel-plated finish not only looks professional but also provides corrosion resistance. These are the kind of tools that serious craftspeople rely on - L.S. Starrett is known for quality precision tools, and these pin vises live up to that reputation. Whether you're working on model building, jewelry making, or any precision task that requires holding small items securely, these vises give you the control and reliability you need. They're available individually or as part of a set, but either way, they're worth the investment if you do detailed work regularly.