Gulleted/Slotted Diamond Blade is the blade of choice when your material is ¾” and thicker.
Note that there’s the risk of an occasional nick on the edge of the trimmed part. This isn’t normally an issue unless you’re trimming a gel-coated or acrylic-faced part and you need a smooth cut.
To learn more about the standard and specialty models, read Making the Cut – Diamond Cutoff Wheels.