Irwin 3" Quick-Grip Spring Clamp. High-tech resin construction provides strength and durability. The non-marring pads protect the work piece, while the specially designed jaws hold odd shaped work pieces. With a 1" clamping capacity and a 3" throat depth, this clamp is designed for one hand use. The soft, pliable pads protect fine finishes, while the jaws are contoured to hold round and odd-shaped objects. The handles are designed for a comfortable hand span, making this clamp easy to use for a variety of tasks.