Craftsman T20 x 3-in. Slotted Bi-Material Screwdriver has a black oxide coating that provides a more precise fit and reduces 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.Improved durability & fit - black oxide tip provides improved durability and grip without compromising tip fitmentQuick rotation control - speed and precision tactile zones provide quick rotation control for efficient run down and precision tasksAdded grip texture - torque zone provides added grip texture and geometry for heavy torque applications