This kit addresses the full range of routine O&M work, from inspecting and cleaning LC, SC, MPO 12-core, and MPO 16-core fiber connectors to testing copper cable runs, validating continuity, and performing live electrical work safely around data center power distribution. Whether you are troubleshooting a degraded fiber link, tracing an unlabeled copper run, or working around live grounding buses and PDU panels, the TK-DC03 has the right tool for the task, all organized and ready for the demands of daily on-site maintenance work.