Built From A Single Piece Of Aluminum Extrusion For Increased Durability And Rugged Use. Dual Bi-Material Hand Grips For Comfort; Two Shock Absorbent End Caps And Non-Marring Side Bumpers For Durability. Features 2 Block Vials On Each End To Provide Maximum Accuracy And A Center MaxEdge Vial Enables Users To Scribe Continuous Lines With An Improved View.