a degradable downhole isolation tool for use in hydrocarbon well completion . the tool sets and isolates zones for fracking , and then degrades without leaving residual parts and without milling or introducing a new degrading fluid . the plug &# 39 ; s mandrel and other parts are a solid polymer which hydrolyzes in aqueous downhole fluid to produce an acid which degrades degradable metal slips and other metal parts . the plug &# 39 ; s seal may be degradable metal pedals or split rings . the plug is delivered to the well site as an interchangeable parts kit for adaption to the well &# 39 ; s requirements .