Made by Wisdom these screwdrivers have fluted plastic handles with chrome plated blades that are fully heat treated with magnetic tips. Sizes of screwdrivers are as follows: flat 5/16"x8", 1/4"x 6",3/16x 6", 3"/16x 4", 5/35"x 4", 1/8"x 3", 1/4x 101/2" ; phillips:#2x 1/4"x4, #1x 3/16x 3", #0x 1/8"x3" and #2x1/4"x1 1/2"; screw holding:5/32"x4".