The Techni-Pro 758TT393 is a tool kit o-ring 5-piece pouch. Designed for replacement of o-rings, gaskets, bearings, seals, etc. on pneumatic and hydraulic devices. Constructed of the finest surgical stainless steel for corrosion resistance to all working fluids, these tools are suitable for use in cleanrooms. Packed in a reusable vinyl pouch, the kit contains a tweezer, piercing probe, prying probe, flat-face pry, scrap tool, and hook for lifting.