Zinc phosphodiesterase, which displays some tRNA 3′-processing endonuclease activity (PubMed:12711671, PubMed:32075755). Specifically involved in tRNA repair: acts downstream of the ribosome-associated quality control (RQC) pathway by removing a 2′,3′-cyclic phosphate from tRNAs following cleavage by ANKZF1 (PubMed:32075755). tRNAs are then processed by TRNT1 (PubMed:32075755).