Nice idea and decently made. The only complaint is that you need to use it with very long drill bits. As you need to put the bit into the hole, line up where you want to drill then rest it on the work surface. Not difficult. After getting it I showed it to my brother who is a carpenter by trade and he said, "why don't you just cut a V into a piece of scrap and use that as a guide, it will accommodate any size bit and you can see where you are drilling." Yea I felt kind of dopey, Since already have this I'll use it.

This works great. I needed to fix some desks and needed a perfectly straight hole. What I really like is during repair if you are on the floor looking up using this tool the shavings from drilling will be caught in the back of the tool instead of falling on to the floor or your face. Just dump when done. Nice and clean work.

SImple tool, reasonably priced. Works well for price and what it is. Certainly easier (and quicker) to get reasonably perpendicular holes vs freehand or trying to use a block of wood, square stock, or other temporary jig. Recommended for light use on non-critical projects. 5 stars based on the product itself, not how it compares to a drill press or other expensive equipment. (Would be 1-2 stars based on comparison to good drill press.)

I know how to hold the drill to make a straight hole. I've done it thousands of times. But there are occasions when it needs to be perfect. I was building a desk/table from an expensive piece of wood that I had spent many hours preparing. To attach the custom metal table legs I used threaded inserts so that the legs could be removed and reattached in the years to come as needed. For this purpose I needed the drill holes to be perfect the first time. This product worked well. I used a headlamp to see down through the guide holes to locate my mark. Then I clamped the guide in place while I drilled the hole. 12 holes in an expensive table top. No mistakes. Well worth it.

I didn't want to spend a lot for the occasional need to drill straight holes, so when I came across this I took a shot. When drilling holes to mount speakers, there isn't much gap to the speaker hole, so the mounting holes need to be straight to prevent breakout to the edge (along with good screw alignment). I used the block to first drill an 1/8" pilot and then used a 5/16" wood bit (not spade). The 5/16" bit went through so easily that I didn't drill the pilot on the next hole, and it was more laborious. So, on subsequent holes, I drilled the pilot first. For aligning the block I used an auto-center punch to mark the hole position, and then put the bit all the way through the block and set the bit point into the punch mark, and then slid the block flush onto the work. Must be aware to hold the block tightly flush to the wood or it will tend to lift sideways (which defeats its purpose). When I first received the block, I sprayed it with brake cleaner to clean it and then sprayed the holes with a Teflon spray as a lubricant. Using this drill block, all holes were much easier to drill straight (perpendicular). Much better having it than not. Not 5-stars because it is a bit difficult to hold, and you need to mind your fingers when the drill goes through. No experience (as yet) on metal or pipe.