SAE Size Include: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4". Our Wrench Lengths Provide Better Lever Performance, Making Your Job Easier and Effectively Loosening Stubborn or Rusty Bolts and Nuts. Flex Head Wrench is Made of High Strength Chrome Vanadium Steel Construction to Ensure Durability for durability, these wrenches will deliver years of consistent performance. 72-Tooth Ratchet: The 180 Degree Flex Head Can Conduct The Projects In Some Awkward Places Easily And Effortlessly The 72-Tooth Ratchet Gears Need Only A 5-Degree Of Working Swing Arc To Reach To The Next Tooth Position., Manufacturer: RFGTHY