Snap-On 10 pc Metric Flank Drive®Plus Non-Reversible Ratcheting Combination Wrench Set (10-19 mm). Listed as used, but not sure any of them have ever actually been used if any of them were ever used it was only once or twice for very brief/light uses. The open ends all look new – other then the 10mm has a small scuff on it (shown in last photo), but doesn’t look like it was ever actually used either. There are some small marks/scratches on each of them, but very minor, looks more like they were just handled a few times or were sitting in a tool box, I really don’t think any of them were ever used. They all work perfect, gears work perfect on each wrench. There are no previous owner markings or engravings on any of them. They are all 100% authentic Snap-On. Comes exactly as pictured with plastic Snap-On tray. Doesn’t come with any other wrenches, tools or accessories not shown in photos. Includes 10-19 mm wrenches in a storage tray. Flank Drive® Plus wrenching profile on open end, “bites” into the fastener, preventing slipping and rounding of fasteners, while providing up to 62% more turning power and strength. 80-tooth ratcheting gear mechanism utilizes key elements of Snap-on® Dual 80® Technology, minimizing swing arc when working in restricted spaces. Gear is cold-formed and use the same proprietary steel found in Snap-on® sockets for ultimate toughness. Gear features Flank-Drive® box-end wrenching system grips fastener flats to deliver up to 15-20% more turning power with less risk of fastener damage. Manufactured from special alloy steel, precision forged and heat-treated for optimum strength and durability. Nickel-chrome finish helps protect against corrosion and makes it easy to wipe the wrenches clean.