Toggle Bolt Anchor Toggle Anchor Type Toggle Bolt Anchor System of Measurement Inch Anchor Diameter 1 in Thread Size 3/8 In.-16 Overall Length 3 in Screw Size 3/8 in Screw Length 3 in Thread Length 2 7/8 in Drive Type Combination Slotted/Phillips Head Type Round Head Diameter 0.63 in Head Height 0.25 in Usable Length 1 3/8 in Wing Span 2.875 in Washer Outside Diameter Not Applicable Material Steel Finish Zinc Plated Color Blue/White Drill Bit Size 1 in