slight clip, (96 mm) 3 13/16" long, .66" wide, .106" thick. tang ~3 7/8"
There are three layers. The center layer is AISI O1, hardened to 58 - 60 on the Rockwell scale. The side layers are a softer grade of steel for toughness. They will hold an edge like a straight razor, but are not brittle. In fact they bend fairly easily and should not be chosen for uses where this will be a problem. The blades vary a bit due to the polishing process, but are about .106" thick.
New pictures to be posted soon. This is only for one blade labeled "KB-1"