Channellock SD-4H 4-piece standard screwdriver set offers advanced performance features to conquer the toughest jobs. Specifically designed to fit the needs of today’s trades professional, Channellock screwdrivers are equipped with precision-machined vacuum heat-treated tri-alloy steel blades for durability and have a non-porous, coated finish for lasting corrosion-resistance. The high-torque, reinforced handles include a part indicator for easy identification and tips are precision-machined for a proper fit on fasteners with great control. This screwdriver set includes PHILLIPS screwdrivers in sizes #1 x 4 in and #2 x 6 in and slotted screwdrivers in sizes 3/16 x 4 in and 1/4 x 6 in so you can conquer all your jobs with ease. Exceed the expectation with Channellock professional drivers made in the USA.Reinforced three-sided high-performance handle is heat stabilized and modified to provide excellent abrasion protection, impact-resistance and chemical tolerancePrecision machined tips engage fasteners with a reliable and secure fitRugged tri-alloy U.S. steel blades are vacuum heat-treated, balancing hardness and resilience for ultimate performanceVibrant polished shaft provides a non-porous finish and coated for corrosion-resistanceIndicators for product type and size are heat stamped for easy identificationMagnetic tip for fastener controlChannellock blue solid grip reduces fatigue and maximizes torque100% made in USA