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Bystanders should be encouraged to wear eye protection. If you are approached, stop the unit immediately. • Only for use on attachment-capable, gas-powered trimmers that have the On/Off Stop control located on the grip. On/Off Stop Control (located on grip) RULES FOR SAFE OPERATION • The TBBC is specifically approved for use with the following models of attachment-capable trimmers: Ryobi: Troy-Bilt: 775R TB20CS 750R TB25CS 790R TB25ET 890R TB70SS TB75SS Yard Man: TB90BC YM25 TB425CS YM75 TB475SS