Thru holes allow wire pairs to be inserted thru front of connector for faster terminations. Works with solid or stranded wire. Simple one piece design...no bars or liners. FCC compliant, UL rated. Use in category 3, 5, 5E compliant data networks. RoHS compliant EZ to verify wire sequence. Max Cable OD: 6.60mm (0.260"), Max Insulated wire OD: 1.041mm (0.041")