Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Drilling Tools International Provides Preliminary Estimates of 2023 Full Year Results Company announces 2023 year end conference call for March 28, 2024 HOUSTON — March 7, 2024 — Drilling Tools International Corp., (NASDAQ: DTI) (“DTI” or the “Company”), a global oilfield services company that manufactures and provides a differentiated, rental-focused offering of tools for use in onshore and offshore horizontal and directional drilling operations, today provid ...