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.
100mm Mini Protractor
100mm Mini Protractor
Regular price
$27.00
Regular price
Sale price
$27.00
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The 100mm Mini Protractor is an essential and compact tool for precision measurement and marking in your workshop. Crafted from durable stainless steel, its small size and clear markings make it ideal for detailed tasks such as setting bevels and accurately laying out joints.
Made in Japan




