The Microtech 135-1TA LUDT Automatic Knife Tan Black Plain Edge. The New Microtech LUDT has Notable changes to the LUDT automatic knife. The most prominent difference is the revised blade profile, with a notched thumb ramp and smooth crowned spine. New-school Tri-Angle hardware and a slick recessed pivot assembly add a fine touch, along with the addition of a hole for lanyard attachment. The milled grooves of the tapered 6061-T6 aluminum handle, which dates back to the early-2000 era models. This model has a plain edge, black finished Elmax steel blade and tan anodized handle with tactical black hardware.