DescriptionSpecificationsDescription1/2-13, 0.65" Thread Length, 1/4" Max Plunger Diam, 1 Lb Init to 10 Lb Final End Force, Locking Knob Handle Plunger Countersunk Knob, 1/4" Plunger ProjectionSpecificationsManufacturer Item No.HDLS-4-PT-GManufacturer NameGibraltar