Removable shaft adjusts within 4'' to 8'' (10-20 cm) range for numerous
length combinations

Blades feature a #1 and #2 Square tip for multiple screwdrivers in one
tool

Proprietary system securely holds blade – as durable as a traditional
Klein fixed blade screwdriver

Press down to extend or lengthen the shaft

Push up to retract or shorten the shaft

Cushion-Grip handle for maximum comfort and torque

U.S. Pat. 6,561,523