The Stabila Type 81 S 10" Torpedo Spirit Level (38648) features a unique die-cast aluminum body, making it one of the sturdiest and most recognizable levels that Stabila offers.  The profile is shaped for easy grip and comfort when it's in your pocket.  The vials are precisely aligned with the milled measuring surface, then locked into position.  Stabila precision vial manufacturing and installation technology delivers best in class durability and reliability.