A regular drill bit roughly the size of the threaded portion of that bolt will do. Drill centered, down to the threaded portion, and the head will pop off. From there the remaining threaded stud should be removable with a vise grip. If it is still seized try soaking it in penetrating oil for a few hours. If that doesn't work grind the remaining bolt flush and use a drill bit roughly the size of the bolt to drill down the first couple threads, then drill a smaller hole 1/4 inch down. From there use reverse, should spin right out. most seized bolts lock in the first 1-2 threads in my experience. Left handed drill bits are nice, but not necessary imo