High-Performance, Bi-Directional Cutting Head The Evolution-E2 features an extruded alloy cutting base and a high-performance double cutting head design that relies on long lasting Graphik blades. These unique reversible blades cater to both left- and right- handed operators and cut materials up to 1/2". The blades can also be set at different depths, allowing the first blade to score the material and the second blade to cut through it in a single pass. Also included is one medium-duty utility blade holder that accepts standard utility blades and cuts up to 3/8" thick.