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 wench, first stage handle bar and more. This complete kit is a great addition to the serious divers save-a-dive-kit.