I bought the stainless steel base that Stu sells at www.toolsfromjapan.com and absolutely loved it, and just bought two more. I plan to order one with each order until I have one for home, one for the shop, one for the boat, one for students... Ok actually the reason I like more than one is when I am sharpening knives for chefs and doing a lot of sharpening or teaching sharpening I like to have each stone in a base rather than swapping back and forth. Really you only need one, but don't tell my wife that.
The stainless obviously has the advantage of being stainless, but also the action of the threads is very smooth as opposed to a plated thread. They loosen and tighten with ease. I am just sharing this for anyone thinking about getting a base for waterstones or oil stones. This is the best I have found. It is around $30 with today's exchange rates. The stainless is not the cheap Home Depot pseudo-stainless steel but more like marine grade stainless, both the rods and the knobs.
By the way, Stu sent a letter to me saying he was delayed in getting the items in my order and would upgrade the shipping. I wrote back saying these were not urgent and so he didn't need to but he sent it EMS anyway and I got them a few days later. Add me to his fan list.
Image shows the one that is about 6 months old and lives in a humid environment. As you see, I use and abuse it. Students do too.
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