It's the most common Shimano-originated pad form factor type, which doesn't have any one agreed-upon name but is often listed as "M525/515", "Deore Mechanical", "M475/425" and others. The "A10.11" is the Tektro model for the pads you have, which are what they call a metallic ceramic compound. You could just keep it simple and get more of those, but all the ...
Keeps the bolt from backing out. Torq the bolt then slip the lock over the bolt head and rotate in the direction the bolt would unscrew unntil the tabs hit something. This will stop the bolt from turning if it loosens.