The Astro Pneumatic 5-pc Ratchet and Release Flare Nut Wrench Sets are available for SAE (No. 7120) and metric (No. 7210M) applications. Featuring a patented ratcheting flare jaw mechanism, the tools offer the strength of a ratcheting box end wrench with the accessibility of a flare nut wrench. Smaller sizes feature a rocker pawl clutch for freeing the wrench from the line and flare nut, and larger sizes are designed to provide more strength. The SAE set includes 3/8", 7/16", 9/16", 5/8" and 11/16" sizes while the metric set provides 10mm, 12mm, 13mm, 14mm and 18mm sizes.