Stanley DynaGrip 10-Bit Ratchet Screwdriver Patented Bit storage system for ease of visibility, access and security. Spring loaded, hard wearing, ball bearing indexing mechanism for quick and easy access.Magnetic bit holder for quick, secure change over of standard 1/4in bits. Top quality patented 3 position, audible, ratcheting mechanism (forward, reverse and fixed) for life long efficiency. Tri-lobular bi-material handle with textured finish for maximum torque and minimum effort. Plated for rust resistance. DynaGrip ratchet screwdriver with 10 screw bits Easy grip Magnetic head for efficient holding and rapid changing of the tip Bit storage cartridge for easy access Tri-lobe bimaterial handle for maximum torsion 3 position ratchet mechanism