Woodpeckers 641 and 851 Precision Woodworking Squares Size:641 Square - 150mm - with Rack-It Combine shims to calibrate blade

Combine shims to calibrate blade cut line from 0

the pencil line is easy to see

PVC & Acrylic

3/4" and 1" blades

KC-116N(FN)

Woodpeckers 641 and 851 Precision Woodworking Squares Size:641 Square - 150mm - with Rack-It Combine shims to calibrate bladePerfect Full Time Shop Companions The previously mentioned "0. 0085" isn't a goal, it's a guaranteefor life. If you ever find your square outside that tolerance, well fix it or replace it. To put that angular tolerance in perspective, on the 641 the far end of the 6" blade would be out by less than half the thickness of a human hair at the maximum allowable variance. The scales on the 641 and 851 are laser engraved to a tolerance of . 004" total