Vintage Snap-on 4pc Set 3/8″-3/4″ 12-Point SAE Flank Drive Half-Moon Box Wrenches CX2024 CX1820 CX1416 CX1012 Professional-grade vintage Snap-on 4-piece half moon box wrench set featuring the patented Flank Drive system, introduced in 1965. This premium set includes sizes CX2024, CX1820, CX1416, and CX1012, covering ranges from 3/8″ to 3/4″. The Flank Drive design provides superior grip and prevents rounding of fasteners under high torque conditions. Each wrench features Snap-on’s renowned 12-point box end design for precise fitment and durability. CONDITION NOTE: Used, and in excellent condition overall, but does include the engraved initials of “ERV” from the original owner on each wrench except for CX1012 (see pictures). Wrenches have some light surface scratches and dirt from storage & use (see pictures)! Does not include the original box, or packing materials. See detailed high resolution (zoom-able) pictures to know what you are purchasing. I encourage you to confirm this information with your own research. Age of Item These wrenches feature the Flank Drive system patented in 1965. Based on the design and markings, this set likely dates from the late 1960s to early 1970s. Search Keywords snap-on tools, flank drive wrench, half moon wrench, vintage tools, mechanic tools, professional tools, SAE wrench set, CX series wrench, automotive tools, 12 point wrench, USA made tools, classic snap-on, box end wrench, chrome wrench, collector tools. If you have any questions feel free to contact me.