Park Tool Screwdriver 3mm Flat (SD-3) size-750ml EXT is the first road

EXT is the first road racing tyre to feature a QR Code - printed on the tire hot patch - for easy access to useful technical information about the tyre

The subtle center grooves and shoulder texture retain the secure feel of the Zaffiros of the past

reaching previously unattainable levels of lubrication and protection

Available in 4 color options

Keep your inner tubes

Park Tool Screwdriver 3mm Flat (SD-3) size-750ml EXT is the first roadAbout Park Tool Screwdriver 3mm Flat (SD 3)Shop quality screwdriver designed for comfort and durability. Featuring dual density grips and heat treated tips and shafts. About Park ToolPark Tool are the world's largest bicycle tool manufacturer. Located in St. Paul Minnesota they have been designing and manufacturing bicycle specific tools since 1963. Their dedication to quality and innovation have gained them the reputation for producing the best