These replacement blades are used with the Adjustable Length screwdriver handle. Each shaft adjusts within 4'' to 8'' (10-12 cm) for numerous length choices. Carry fewer tools with these versatile multi-length, multi-bit drivers.PRODUCT FEATURES:• Replacement blades for Adjustable Length screwdriver handle• Each shaft adjusts within 4'' to 8'' (10-20 cm) for numerous length choices• The shafts are removable and reversible with a different tip on each end• Include #2 Phillips & 1/4'' Slotted; #1 Phillips & 3/16'' Slotted; #1 & #2 Square tips