DEWALT DW2220 Nut Driver, 3/8 in Drive, Magnetic Drive, 1-7/8 in L, Steel

Made of shock-resistant tool steel for maximum durability. Hardened core for extra strength and reduced breakage and stripping. Heat-treated to resist breakage and wear; 1/4 in hex shank. Features: - Patented geometry reduces rounding of the hex - Extra-strength magnet for excellent bit retention - Advanced hardening process provides maximum durability