Soft-Grip handle is larger and more ergonomic, allowing high clamping pressure with less effort. I-beam bar reduces flexing and bowing. Larger clutch plates allow for easier release and increase durability and dependability. Locking clamp is great for general workshop needs. Clutch lock mechanism lets you quickly and easily adjust jaw with the touch of a button. IRWIN® Tools QUICK-GRIP™ Bar Clamp, 6-inch (223106)