This is a Garcia Conolon grip. It is compatible with bat ferrules, but a 9.0mm ferrule insertion is best. AFZ bat ferrules are about 8.9mm, which is slightly thin, so tightening them will distort the blank. Robelson bat ferrules are good in terms of diameter, but the body depth is shallow (the head cap is short), so you will need to shorten the bat ferrule by 3-5mm, or attach a winding check to the tip of the head cap. Otherwise, the insertion side of the bat ferrule will be visible at the tip of the head. The example of installation in the image is: Insertion Length AFZ Insertion diameter: approx. 8.9mm 36mm Featherweight: approx. 9.4mm 41mm (Insertion point without threads) Robelson: approx. 9.0mm 40mm Handles with sleeve fixation, not 3-jaw fixation, are made to the best size to match the bat ferrule set at the time of production, so if you set a different blank, you will have to change the sleeve or modify the ferrule to avoid distortion or looseness. Please assume that some processing is necessary when setting a different blank. The bat ferrules in the image are examples of installation and are not included in the product. It is a very old item, and although there is deterioration over time, there are no problems with use. Only those who understand old, vintage, and used items Those who can proceed with the transaction smoothly Those who understand Japanese are welcome. Old grip Garcia CONOLON Vintage rod Rod building