Shimano compatible (TL-FH20, equivalent to successor TL-FW03) freehub removal tool. Although the vinyl packaging has 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 these tools because they consider their freehubs to be maintenance-free and don't want amateurs messing with them. Therefore, this is for those who can research things on their 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 to prevent it from falling out has a shaft diameter of approximately 6mm. It should be usable not only with current rear hubs (hub axle diameter 15mm) compatible with Shimano 10s and 11s (excluding 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) was released as a sister product 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.