3/4", H-Style, Pipe Clamp, H-Shaped Foot Assembly Stabilizes The Clamp In Two Dimensions Giving Dual-Axis Stability, Extra High Base Provides Industry Leading Clearance From The Work Surface, Cast Jaw For Durability, Smooth Action Spindle, Soft Protective Pads Included, Clamping Strength & Opening Size Are Dependent On Length Of Pipe Used.