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Porter Cable 48083 Protractor Gauge for All Circular SawsThis was an excellant buy and shipping was really fast too I was real happy with the service and product
Its a good layout tool and saw guide. For clearance, it must be on the blade side of the saw, which means that you must hold the cut off piece instead of letting it fall with the guide attached to it. The only drawback is that you must clamp it to the work piece with a plastic hand grip type or "C" clamp. I bought this guide to go with my PorterCable 447K, 7 1/4 inch circular saw and found it to be a handy accessory. Its accuracy is easy to check and it helps produce straight, neat cuts. Also, don't leave the guide on the floor to step on since that can bend it. I've learned to trust it.
The "pointer" is adjustable with a small screw and will stay put pretty well. I always use a "pattern" piece when laying out rafters. I check it with my Swanson occasionally. I use mine only occasionally - when I am cutting other than 90 degree angles. The fixed 90 on the Swanson is always there. This guide does have plenty of good uses if you are careful with it. It has a protractor style degree scale. I may Modify mine someday by putting on a larger, jig-style wingnut that will allow greater tightening force, making it less necessary to check the setup repeatedly.
I used to use it for 90's before I bought my Swanson Speed Square (see that review), but it does tend to slip out of adjustment if it is bumped around. I check the angle of this jig on the pattern from time to time to make sure it is still set correctly. I might also try gluing some sandpaper to one side to provide more friction in the screw area. The wing nut will keep it adjusted pretty well, but it is tightened against smooth surfaces, which are necessary for infinite adjustment.
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