I don't usually get overly excited about bike tools, but figured I'd share this one because it's a bargain. My Sondors Rockstar is my first bike with disc brakes. It didn't take long to learn about the importance and braking improvements from proper caliper adjustment/alignment to the disc. This little tool from Amazon worked incredibly well and made the adjustment a breeze: https://www.amazon.com/gp/product/B08XWKCZY4/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
FWIW
FWIW