"The PL2 provides extra defense against theft beyond Chief’s standard All-Points Security without the extreme of enclosing the entire projector mount. Available in three key options: PL2A, PL2B, PL2C See the PL1 for use with larger projector models - Keyed lock for an added level of security - Model PL2A includes key option ""A""; Model PL2B includes key option ""B""; Model PL2C includes key option ""C"" - Maintains convenient lamp and filter access for hassle-free maintenance - Compact design for a discrete appearance - Compatible with new or existing RPA series installations - Allows standard routing of cables through 1.5"" NPT pipe - Ships fully assembled"