Robert Baraban Pinch Grip Converter - Convert Your Hand Gripper Into a Thumb Trainer LISTING IS FOR A SET OF PINCH GRIP ATTACHMENTS ONLY - NO GRIPPER IS INCLUDED FITS MOST MAKES AND MODELS OF HAND GRIPPERS Will NOT fit the Robert Baraban Deluxe Steel Adjustable Hand Gripper 50/500lbs with Negative Rep Handle Handles measure about 5.25 - Finish may have nicks and small imperfections Designed to clamp onto your gripper above the handle knurling (on a adjustable gripper) Will leave a clamp mark on a regular style gripper but the clamp mark will be high up on the handle