Hand Knob Handle Type Wing Handle Material Steel Thermoplastic Mounting Type External Thread Thread Size 5/16 In.-18 Thread Standard UNC Handle Dia 28.00mm Base Dia 12.00mm Overall Height 15.00mm Screw Length 20.00 mm Overall Length 1.38 in Includes - Standards RoHS Thread Type UNC Color Black Features Durability and Strength Ergonomic Design Finger Specific Precision Performance Finish Matte