Review on Performance Tool W38202 Socket 10 Piece by Robert Yates

This is a decent set of heads for the money but one thing surprises and disappoints. The "19mm" jack is out of tolerance. With the exception of 19mm, the rest of the socket set is 0.3mm to 0.5mm larger than its nominal size, which is the industry standard for anti-corrosion, ease of installation, etc. However, the 19mm size is larger by 1.4mm. This is a giant jump that results in a sloppy landing. This is doubly odd because a 19mm 1/2" percussion instrument I bought is 19.3mm as it should be. I like the Wilmar/Performance tool and its price and good quality but someone has to figure out their measurements in metric.