Blade width 16 and 25 mm.Automatic blade lock.Class II accuracy.-E products have both metric and imperial scales.High grade carbon steel blade.M products have magnetic tip and reverse blade printing.Rubber grip.Easy to read high contrast permanent markings on the non-reflective nylon coated high grade carbon steel blade.Easier to use as blade stays out until retraction button is activated thanks to the automatic locking system.Less chance of damage if dropped with impact absorbing rubber case.Easy carry integrated belt clip