Jorgensen has fine-tuned its ISD3 Clamps with a quick-release lever and a larger clamping surface for easier use, while retaining the clamps popular features. ISD3 clamps feature a unique expandable design, which allows two clamps to be combined into one single clamp providing an additional 6" of clamping length to their bar clamps. The quick release lever allows easy changes to the expanded or reversible position, and the clamps still work with your current ISD3s. With 330 lbs. of clamping pressure over a larger clamping surface, the ISD3 can be used like a parallel clamp. The ISD3 still features the Dual Durometer handles and is truly a woodworking capable clamp.