Modular crimp-connector installation tool for voice and data applications with Pass-Thru RJ45 connector plug Compact Crimper crimps and trims Klein Tools RJ45 Pass-Thru connectors onto paired-conductor cables (round STP/UTP cables) On-tool wiring guide helps minimize wiring errors Fast, reliable RJ45 Pass-Thru modular crimper installs connectors for data applications Use with Klein Tools Pass-Thru Connectors Not for use with standard (non Pass-Thru) connectors Replacement blades available (Cat. No. VDV999-078)