Standard .401 turn type parker shank for air guns. Fully hardened and tempered shock resistant tool steel. Black oxide finish to prevent corrosion. Set Includes the following: 3/8 Nut Splitter 3/4" x 18", Scraper 1-1/8" x 18", Taper Punch 3/8" x 18" & 1/8" x 18". All in an anti-slip storage pouch. Made in the USA.