Shimano compatible (TL-FH20, successor TL-FW03 equivalent) freehub removal tool. Although the vinyl packaging may have slightly discolored due to storage in a store, it is a new, unused item. This tool is used in a similar way to the Shimano TL-FH20 and its successor TL-FW03 (discontinued), and is used when disassembling Shimano freehubs. Please use it in combination with a monkey wrench or similar tool. Well, Shimano probably discontinued it because they say their freehubs are maintenance-free and they don't want amateurs messing with them, so please only use this if you are someone who can research things on your own. I'm not an expert either, so I've included as much information as I know for your reference. Shimano Freehub (articles full of detailed information from that time) dt6110.web.fc2.com/parts/cassette1.html Shimano HG (7-8 speed) article ameblo.jp/rikitarou1979/entry-12109893805.html The shaft for holding the tool in place has a shaft diameter of about 6mm. It should be usable not only with current rear hubs (hub axle diameter 15mm) compatible with Shimano 10s and 11s (but not Dura-Ace), but also with 11s hubs with a 10mm hub axle diameter. Manufacturer: Toopre Model: Tj-019 Material: Stainless steel Length: 155mm Weight: 140g Size: Outer diameter 28mm, inner diameter 19mm, shaft diameter M6mm By the way, TL-FH20 (and its successor TL-FW03) were released as sister products to TL-FH40 (compatible with Dura-Ace AX, EX(UG), 600 AX, EX, ADAMAS AX, SQ, SK, SN, 5A/6A) at that time. Probably also compatible with HG (7-8). However, unfortunately, TL-FH20 and its successor TL-FW03 are not compatible with Dura-Ace. Also, these tools cannot be used with the early model of Dura-Ace EX (FH-7250, 7260) or TL-FW10.