Very annoying at first! I put it on a digital caliper and saw that it was smaller. But I've seen others use it in reviews as I intended (carving the trigger pocket 80% deeper) and the reviews are solid so I'll try.
Pros
Weight: 27g Package content: 1 x Straight Shank End Mill
Worst tool I have ever bought. I'm trying to mill aluminum with it. With the same success you can use a plastic cutter, it cuts better. They're cheap, but don't waste your money on them. They're not worth the time it takes to take them out of the box.
Pros
Depth of Cut: 22 mm/7/8 in.; Shaft Diameter: 7.9mm/5/16 inch