Purchased for detachment of Shimano made Holotec Ⅱ. It is suitable for use in older type Hollowtec Ⅱ. The fitting part with BB is also made deeply, but the original BB side groove is shallow and it is easy to disengage from work. M12 bolt nut, you can work with confidence without licking the groove when fixing with a big washer. Although it is hard to understand in the photograph, since the place to wrench is octagonal, it turns in a hex wrench socket and can not be used. Although other people are also written, there is a need to do via the adapter to install the new Hollow Tech II SM - BBR 60 etc, but this product is slightly different dimension of the mating part and can not be installed. The adapter can be installed without clearance from the Shimano genuine tool. We recommend that you buy it for future use after fully considering it.
Attention is required when using Shimano's new type bottom bracket (such as SM - BBR 60). Because the new type bottom bracket has become smaller, it has an adapter for turning with the conventional Holotech tool, but it does not match this tool. You need to scrape around the adapter to make it smaller. (It is resin that can be cut with a cutter etc.) There is no problem with this product itself or use with Holotech 2. I think that it is firm making.
Maintenance and replacement of outboard boat BB is an indispensable tool. It can be used with a torque controllable spinner handle or impact wrench. In our company, maintenance slump GPX. Used in Holo Tec II and FSA for replacement work. It fits without problems.