These are ferrules for iron and wedge clubs, used when assembling golf clubs or reshafting with steel or carbon shafts. Ferrule Specifications: Inner Diameter: Approximately 9.4mm (0.370 inches) Outer Diameter of Base: Approximately 13.7mm Body Length: Approximately 18.9mm Color: Black New and unused. I also use these ferrules for steel shafts (Tip diameter 9.0mm) and carbon shafts (Tip diameter 9.3mm). The shaft thickness near the ferrule installation is generally around 9.4mm, making them versatile with a wide range of shaft compatibility, and I have confirmed their quality. If you have any questions, please ask in the comments section. ※ For those who prefer anonymous shipping, tracking, or expedited shipping, please request the following shipping methods, as regular mail does not offer tracking or compensation, and does not deliver on weekends and holidays. ・Nekopos (anonymous, tracking, compensation): add 70 yen ・Click Post (not anonymous, tracking, no compensation): add 50 yen Please contact me in the comments section before purchasing. I will change the listing after your request. ※ For those who want multiple items: Each additional item is 220 yen. Please contact me in the comments section before purchasing with the number of items you need. I will change the listing price and content after your request. ※ I am selling four types of ferrules: "for irons/wedges," "for irons/UTs," "for FW," and "for drivers/FWs," so please consider them as well. ※ Please check the dimensions of your shaft and hosel before purchasing. ※ Please read the profile section.