Heavy duty plastic orange handle and guard; plastic cap protects cutting edge keeping it sharp. Scale graduations to 60 mm. Measure tree bark thickness (up to 2 1/2" or 60 mm) quickly, easily and accurately. To use, put the palm of your hand against the handle and deliver short quick strokes to easily drive the cutting edge through the bark until wood is reached. Then slide guard against tree or log and read bark thickness directly off the scale.