Milwaukee's 9-in-1 Square Drive Ratcheting Multi-Bit Driver features 3-1/2" interchangeable power groove bits that are power tool compatible giving you maximum job site versatility. An all-metal ratchet gives you 2X faster driving in high-torque applications without sacrificing durability or control. The multi-bit screwdriver also has wrench-ready hex shanks providing you with additional leverage. The interchangeable bits are precision machined and chrome-plated, providing marine-grade rust protection and reduced wear giving you the best job site durability. The screwdriver features magnetic bit retention providing you with consistent driving performance. The MILWAUKEE? 9-in-1 Square Drive Ratcheting Multi-Bit Driver is designed for the job site and includes Milwaukee?s Limited Lifetime Warranty.