Shinwa 62103 Japanese Mitre Square

On the back of the package it says its guarantied to be accurate to .01 mm in 100 mm. If my math works out it accurate to 0.01 degrees (arcsin(sin(pi/4)-.0001) For reference, the Incra Guaranteed 45 degree miter square is accurate to .001 inches in 5 inches or accurate to 0.02 degrees (arcsin(sin(pi/4)-(.001/5))) and a Starrett combination square is accurate to .004 inches in 12 inches or .003 degreesThe miter square is also nice and heavy with a good fence, its a great size and I'm really happy with it.-James

high quality product and accurate. Nice weight and finish

This just does what the description says it does. But, it does it very, very well. It is very well made and solid. It is more accurate than most angle devises I have in the shop and matches those few that are precise. You feel as if you have a real gauge in your hand rather than a plastic or thin metal imitation.

Extremely high quality. Perfectly proportioned and very useful. I look for excuses to use it because it feels great in the hand and (absurdly enough) it is a beautiful looking tool. Thanks.

Precision tool. Great quality. I don't have a dedicated 45 sled built yet. This tool definitely helps fill the void.

Not bad. Edges need a little finishing, but it's definitely true to 45.Very handy for blade setup.

I had one of these about thirty years ago and found it very convenient for layout. In fact, after I rebuilt my wood shop, I missed having one several times. As such, I was pleased to come across one again. It remains as convenient for laying out miters and such as it was so many years ago. Its tolerances are fine for establishing tight miters with a knife or point five pencil.

It looks nice. Too bad it fails at being 45°, it's one and only function.