This very neatly packaged tool kit contains pretty much everything you need for making minor repairs and adjustments to your equipment---anything major should probably be referred to a professional service technician. Two adjustable wrenches let you separate hose adapters or hold a first stage while removing or replacing a hose. Phillips-head and flat-head screwdrivers are often useful for repairing torches. Pliers come in useful for snapping off mouthpiece tie wraps. An O-ring pick makes getting those small seals out of their grooves a breeze. The Deluxe Divers Tool Kit is an excellent first choice to accompany your save-a-dive kit.