Shinwa Rules Co., Ltd. was formed in 1971, when three measuring-tool makers, Watanabe Doki Seisakusho, Hanyu Keiki and Watasei Doki, merged in the Tsubame-Sanjō region of Niigata, a centre of Japanese metalworking for centuries.
Shinwa has focused on accuracy from the start. It patented a calibration method for stainless steel rules in 1977, gained ISO 9001 certification in 1999 and became a JCSS-accredited calibration laboratory in 2001. The company opened an office in Dalian, China, in 1991 and a branch in Illinois, USA, in 2007.
Shinwa is now Japan's top-selling maker of metal rules. Its squares, rules, sashigane, marking gauges and levels are used every day by carpenters, metalworkers and makers who need measurements they can trust.
30cm 90° Circular Saw Guide
30cm 90° Circular Saw Guide
Regular price
$89.00
Regular price
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$89.00
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Find your guideThe Shinwa 30cm L-Angle Fit Circular Saw Guide is a longer, more stable squaring guide for trimming stock to length with any circular saw — corded or cordless. Two reference points spaced 200mm apart give the guide a broad, steady bearing against your material's edge, so it holds square even on wider boards or sheet stock where a smaller guide would rock or wander.
An extra 50mm of guide extends back toward you beyond the material, giving your saw's base plate a wider surface to register against before the blade ever touches the timber — so you get a true, repeatable 90° cut, first try. It's built for the classic left-hand-guide, right-hand-saw grip, and its solid aluminium body is sized to take daily job-site knocks without losing accuracy.
Designed in Japan by Shinwa, manufactured in China to Shinwa's specifications.
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