Bumax, which has the same strength class (10.9) of steel bolts despite being stainless steel, offers four times the strength (yield strength) of SUS304 (A2-50) and double that of SUS316 (A4-70). The 20 mm diameter of the SUS304 (A2-50) bolt can be downsized to 10 mm with Bumax, and its weight reduced by one quarter.