DIY Building Supply offers the CRAFTSMAN 10 pc Precision Bi-Material Screwdriver Set have black oxide coating providing a more precise fit and reduced fastener stripping and cam-out. The polypropylene material, and ergonomic shape of the handle offers twisting force for three different applications; a speed-zone for quick rotation, a torque-zone for added grip in heavy torque applications, and a precision tactile zone for tasks requiring more rotation control. The Black Oxide Tip provides improved durability and grip without compromising tip fitment, Speed and Precision Tactile Zones provide quick rotation control for efficient run down and precision tasks,  provides added grip texture and geometry for heavy torque applications.  The set comes with CRAFTSMAN lifetime warranty