TEKTON 8" SHEET METAL CLAMP features: Drop Forged, Heat Treated Steel Jaws, Chrome Plated for Durability, Thumb Screw Adjusts Lock Jaw Capacity, Quick-Action Release Lever Unlocks Clamp with a Simple Squeeze, Powerful, Non-Slip Jaws Hold Parts in Proper Alignment, Deep Reach Throat for Holding and Crimping Sheet Metal, Use to Square Corners, Hold Pieces for Welding, Crimp and Double Crimp Edges, Bread-Pan Corners, and"-Drive Cleat" Edges. Ideal Accessory for Welding, Soldering, and Riveting.