The extra-thick 6.4mm core offers ample useable color and the 11mm hexagonal wood casing gives comfort to grip. All colors blend and layer easily. They are opaque and provide great coverage, allowing for both fine and broad lines. The lead has also been glued to the casing to prevent breakage. The pencils feature a transparent lacquer except for the 3/4" tip that conveniently indicates the true color of the pencil.