Features:1. Joined two LC duplex fiber patch cables together, Securely connect your 62.5/125 multimode, 50/125 multimode or 9/125 singlemode fiber optic patch cables.2. Protective caps on the LC to LC coupler to make sure the fiber keystone jack and multimode fiber cables clean and safe, Installation of female to female keystone insert provides a professional looking installation in the home or office.3. Panel-mountable for convenient access to all your connections and designed for long term reliability. 4. This product is precision engineered, manufactured with high quality materials and built to last longer than the cables it connects.5. Compatible with OM3 10GB Multimode Cabling, These keystone inserts are compatible with wall plates, patch panels, and surface mount boxes.