The Thru-the-Lock (TTL) Attachment enables efficient cylinder spin-outs and realistic lock manipulation training using Adam’s Rite–style locks and residential deadbolts. This quick-connect TTL interface mounts to standard training door frames and accepts dedicated training cylinders, allowing instructors to demonstrate and supervise forced-entry and locksmithing techniques without modifying live building hardware. Included training locks replicate field resistance for practice on spin-out procedures, shimming, and deadbolt manipulation—delivering repeatable, low-cost evolutions that preserve realism while protecting primary training doors. Built for classroom-to-field transition, the TTL Attachment speeds setup, supports high-throughput drills, and integrates with Forge Fire door-mounting systems for consistent, safe practice.