How can I drill into cinder blocks and attack brackets?
In my humble opinion, you've got two choices using those brackets in cinder block. You can use 1/4" toggle bolts if you drill in the hollow section of the block or 1/4 or 5/16" lag bolts with lead shields for the solid area of the block. These are common items at your home store. Lag shields need a 1/2" hole drilled in the block and the toggle bolts need a 5/8" hole. A regular masonry bit will do the trick. Don't use a hammer drill. Good luck and stay safe out there.