Rugged rubber-grip case, blade-lock, brake and auto return. Double-riveted tip with wraparound reinforcement. Durable, coated blade. Measures both internal and external lengths. Easy to read graduation marks with highlighted joist marks every 16″. Wrist strap & belt clip. Rugged rubber-grip case, blade-lock, brake and auto return. Double-riveted tip with wraparound reinforcement. Durable, coated blade. Measures both internal and external lengths. Easy to read graduation marks with highlighted joist marks every 16″. Wrist strap & belt clip.