Drill Size 17/64", Made in the USA
For Bolts/Screws - 3/8" - 5/8", 1/4" Pipe
$11.71 /Each
To remove the broken threaded part: Drill a hole in the end of the broken part (left hand spiral heavy duty drills are recommended for this drilling operation), insert extractor, then turn counterclockwise using a wrench on the exposed end of the extractor.