19BK412 up for sale is a new heavy duty regular blade screw driver , this is new came in from military surplus we aquired , no part number was listed for this , no brand is marked on this tool , nice quality the hand is 4 inches long the total length is 12 inches stem is square and measures 3/8 , the tip is 0.419 wide and tapers up to 0.595 wide , the tip is 1/16 thick near the end and tapers up to the 3/8 , nice heaver duty tool the handle is 1.087 diameter , black gloss plastic , some dust and light scratches from storage on the base , not used ,