Good concept, poor calibration
This is a good tool but, as stated by other reviewers, the scale is not accurate. This means that you either have to set you saw directly from the tool, or you have to measure the angle with a protractor to use the saw's scale.
If you want to calculate for compound mitres then you have no choice but to measure the angle from the divisor using a protractor.
It's a real shame because it costs no more to make a tool that's accurate, it's just a lack of rigour in design and production.
16 Oct 2014
What a time saver!
Just fitted a large flat with trunking for 6 smoke alarms using this in combination with a cheap bevel gauge and chop saw. Beautiful, spot-on mitres every time. It saved me hours of inaccurate fiddling with mitre blocks when everyone knows that buildings never have exact right angle corners.
Yes, as an earlier reviewer stated, the numeric angle read-out is wrong but that doesn't matter if you don't need to know the number of degrees, just the position of the half-angle to set your chop saw. Love this gadget.
12 Jul 2014
Internal angles only
Nice tool, works well, and accurate. Of course - it only does internal angles (30-170 degrees).
The clamp design could be improved as the overhang either side gets in the way of striking a line onto whatever you transfer the angle to. Not a big fault though on an otherwise good tool.
20 Jun 2013
reliably wrong - every time
This is a well designed tool very close to being ideal for measuring internal angles and setting saw angles. It is well made of good materials -
unfortunately the scale is plain wrong and it goes from bang on at 90 degrees down to 3 degrees wrong at 45 degrees.
It is a great shame because it could easily be solved by calibrating the scale properly but it is completely useless as it is.
12 Aug 2012