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It took hours to fix the door after using this tool.I threw this thing in the garbage. Then I cut the 1" diameter edge hole and things went from bad to worse.
Some careful measuring and shimming got it near true, that's when I realized the hole saws were both oval, not round. The center drill portion of the hole saw was so far out of true that it could not be used.
I got a hole the wrong size in the wrong location and it took me a long time to do it. The shaking due to being out-of-round made the face jig wander 1/4" too low during drilling (it is free to slide up and down even with the jig screwed down).
Because of the shape the saw cut a hole bigger than it should have, and because it wasn't round it had to cut a lot more wood than it should have. The "self centering" jig cut a hole nearly 1/4" off center, too far off to mount the strike plate.
Don't throw your money away on this.
When you drill a hole for a lockset, it's recommended that you drill halfway in from each side so as not to mar the door's surfaces. The problem is that there is too much wiggle in the apparatus, and sure enough, my holes did not line up. This makes lining up your approaches crucial, and this jig is supposed to help. (I bought the #17105 - the version for wood doors). I think I could have done a better job freehanding it.There were more expensive jigs to choose from, but I thought "why spend a lot on a tool I'll only use a few time." Now I have my answer - because replacing a door is expensive. Pass on this tool.
This is mostly plastic and wiggles way too much - the hole saw caught on the first door I tried, and walked away from where it should have been (the plastic isn't strong enough to keep it in place). The centering function on the end of the door is poor as well. I threw mine in the trash. Look on ebay - you can find old models (From other manufacturers) that were made from metal.
However, the hole saws supplied are not that great. This little gadget works very well in helping to install locks in standard-sized doors. Simply screw the guide onto the door edge and drill the two holes for the locks with the included hole saws. They will dull pretty quickly. Anyway, for the inexpensive cost this set is a pretty good value.
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