SpeTool S04001 Portable Drill Guide – 0.004 inch Precision, Adjustable 0–60° Multi-Angle Drilling, Heavy-Duty Aluminum Base

Nice tool, but one complaint

I use this tool for drilling leg holes in chair seats since I always had trouble being consistent four times! I helps quite a bit but I noticed that the hex connection does fit on my Bosch hex drivers, it is slightly larger (measures about 0.26" across the flats).

Excellent guide

Got to use this immediately on a job requiring a lot of holes drilled in an attic. This also took advantage of the centering pins. Worked very well. I do a lot of angled drilling, so having a guide that has such a solid lock for the drilling angle will be useful without having to cut drilling blocks. My only modification was adding a block and a magnet to the back to hold the chuck key to keep it handy and not lost.

The hex point where you attach the trill twisted after 2 uses, very soft steel and now the product is useless.