Safety Switch Fits John Deere SX85 X300 X300R X304 X305R X310 X320 X465 MowersOne New Aftermarket Replacement Safety Plunger Switch Fits John Deere X300 Series and SX Lawn & Garden Tractors This aftermarket replacement plunger style safety interlock switch serves as a brake PTO safety switch on Fits John Deere lawn and garden tractors. The snap in double pole design uses a normally open normally closed configuration with 4 terminals, allowing the machine's safety interlock system to prevent engine start or PTO engagement unless