Light-duty steel bar clamps. All adjustments are made in the moveable sliding head, making this style of clamp fast acting, easy to open and close and suitable for "close quarters" clamping. Strong light-weight steel bars are rust resistant. Multiple disc clutch holds securely at any point along the bar.Reach: 2-1/2" from edge of bar to center line of screwBar: 1/4" x 3/4" plated, round-edge, high-carbon steelCastings: Malleable and/or ductile iron; orange baked enamel finishClutch discs: Hardened, plated steel