This hex key set has a length of 7.6 mm, 7.7 mm, 8.7 mm, 9.1 mm, 9.8 mm, 10.5 mm, 10.8 mm, 11.4 mm and is not insulated, plus it has a plastic handle. In addition, it is made of alloy steel, has a metric/SAE measurement type, is corrosion-resistant, has a black oxide finish, plus it is not non-sparking, is not non-magnetic, and is not tether ready with an ergonomic grip. This hex key set includes nine pieces.