Living House Industrial Level Professional 11-Inch Locking Clamp with Swivel Pads (1 Piece) Locking C-clamps to secure your work Jaws open up to 4Inch for larger work pieces Leveling swivel pads protect against work piece damage Made from durable heat-treated alloy steel Locking clamp is constructed of high-grade heat-treated alloy steel for maximum toughness and durability.