Dense-Fit, Angled Dense-Fit and Easy-Fit Keystone type Panels are engineered to accommodate a large variety of Category 5e, 6, and 6A, Multi Media and Fiber Optic Keystone type jack Inserts manufactured by an ever growing number of Top Modular Jack Manufactures in the Industry. Please contact ACSP-Varitronics for a list of compatible jacks by manufactures and part numbers..