Our divot tools fit any 24.5 mm (or .970 dia.) ball marker! 1 Brand New ONE OF A KIND Putter Mounted Divot Tool and Ball Marker. Not available in retail stores. No more holes in your pockets. No rust marks on your $30.00 hats. More importantly your divot tool is not 50 feet away in your bag when you need it. Always have your divot tool and ball marker when you get to the green. Fits all putter shafts. Ideal shaft size is .520 diameter, this allows divot tool to slide to the grip and stay in place. Larger shafts divot tool will not slide the entire way to the grip. Smaller shafts may require a wrap of waterproof tape to size the shaft so divot tool will stay in place. To install simply snap divot tool on to the small end of the shaft by the putter head and slide up the shaft till it stops on the shaft. To use, slide it back down to the small end and pull it off. Magnetic ball marker included as shown. Usually Ships Next Business Day!