Southco Inc E3-57-25 Knob-Handle Vise-Action Compression Latch Grip Range .250 to .375, Southco Single Hole Mount Grip Range .250" to .375". Easy to install. Locks door then pulls them tight with one half turn. Internal O-ring gasket provides consistent compression. Maximum working load 100 lbs. Black polyester coated die cast zinc housing with black knobs or caps. Key must be ordered separately for key operated style.