Hand Tool, Tool Type Double Ratchet Hand Tool, Compatible Thread Size #10-32, 1/4 In.-20, 3/8 In.-16, 5/16 In.-18, Compatible Rivet Nut Material Steel, Mandrel Sizes Included #10-32, 1/4 In.-20, 3/8 In.-16, 5/16 In.-18, Material Steel, Overall Length 8 11/32 in, System of Measurement Inch, Compatible Insert Type Rivet Nuts, Includes 1/4 In.-20 Insert, 10-32 Insert, 3/8 In.-16 Insert, 5/16 In.-18, Power Source Manual