[Cr-V Structure] It Is Made; Made Of Hardened Chrome Vanadium Steel Heat Resistant With A High Quality Matte Chrome Surface, Which Can Provide The Best Corrosion Protection, Thus Extending The Service Life, Strength And Durability. Eccentric Ratchet] The Spanner Set Eccentric Ratchet With Professional Double Head Can Touch The Fasteners In The Awkward Spaces To Create Spaces For Your Fingers, Not Easy To Slip. Rust And Easy To Remove. Around Obstacles.[Key; To Ratchet Mechanism] Reversible Ratchet Double Ring With 72 Teeth. Quickly Switch With One Hand, Rotating Clockwise And Counterclockwise.[Simple And Convenient] Our Key; To Ratchet Adopts A Design With Double Ring, Which Is More Convenient To Wear. To Use. The Tool Size Is Marked On The Surface For Easy Identification And Not Easy To Slip. Scratch.[Wide Use] Offset Pawl Is Used; For Do-It-Yourself Hand, Auto Repair, Janitorial Service And Most General Repairs. Very Suitable Professionals And Occasional Diy Enthusiasts.