Don't let a Loose-Hose Fitting, Blown O-ring or Leaking Regulator cause a problem on a Dive. Don't be caught without having the proper tools and parts to fix it. The serious diver is always prepared to nip a dive aborting problem as it occurs. That's just some scenarios that this kit can remedy. This 65-Piece Professional Diver Tool Kit comes in Organized Zippered CORDURA Pouch with Top Grab Handle for Easy-Transport and includes 2 Specially Developed Thin" Scuba Wrenches. Wrenches have 4 sizes of 5/8", 9/16" on one Wrench and 1/2", 11/16" on the other which fit most regulator 1st & 2nd Stage Hose Fittings. The Wrenches Thin" Design allows Easy-Access to Hose Wrench-Flats that Standard" Thick Open-End Wrenches do not. Also included in the Kit is a High-Quality Crescent Wrench, Phillips Head and Flat Head Screwdrivers, Multi-Tool Hex Wrench Set, Needle Nose Pliers with Side-Cutter, Professional Brass O-Ring Pick Set, O-Ring Kit, 2'nd Stage Adjustment for Poppet's and In-Line Adjustment Tools, Spanner Wrench, First-Stage Handle Bar and more. This Complete Kit is a great addition to the Serious Divers Save-a-Dive Kit.