13 mm 12-Point Metric Flank Drive® Reversible Ratcheting Box/Speed Open-End Combination Wrench | SRXRM13 1/4" Drive Tools • Flank Drive® wrenching system

• Flank Drive® wrenching system on the box end generates up to 15-20% more turning power than conventional wrenches

• A continuous arc design distributes stress over the entire wrench opening radius for greater strength

• 1/2" square with single offset hex design

• Description (Chart) : Standard Handle Hard Grip Locking Flex-Head Ratchet

• Easy to clean—closed cell cross-linked foam resist oils

13 mm 12-Point Metric Flank Drive® Reversible Ratcheting Box/Speed Open-End Combination Wrench | SRXRM13 1/4" Drive Tools • Flank Drive® wrenching systemPatented open end speed wrenching configuration delivers more speed than conventional wrenches Speed open end provides quick, ratchet like action Flank Drive wrenching system on the box end provides up to 1520% more turning power with less risk of tool or fastener damage Manufactured from special alloy steel, precision forged and heat treated for optimum strength and durability Up to 80 gear teeth for minimal movement in tight areas Box end is offset