The Dewalt 1/4 inch x 1-7/8 inch steel magnetic nut driver features a powerful magnet that helps keep this handy drill attachment in place. The driver is made from steel treated with an advanced hardening process for durability. Patented geometry reduces rounding of the hexAdvanced hardening process provides maximum durabilityExtra-strength magnet for superior bit retentionHeat treated to resist breakage and wearShock resistant tool steel for maximum durability1/4 in. Nut Driver1-7/8 in. length