LISTING INCLUDES: 1Pcs Engine Barring Socket FIT FOR: For Caterpillar(CAT) engines 3200/3406 series C13/C15/C16/3208/3400/3406e/3508/3512/3500 EUI/MUI engines,For Mack E7/E-7 ETEC Engine and so on. ABOUT PRODUCT: SUPERIOR QUALITY:Made of high quality Steel resisting corrosion and rust, ensure years of trouble-free use. EASY USAGE:Engine Barring Tool only insert the tool into the flywheel housing until it engages the ring gear, then attach a 1/2″ square drive ratchet or breaker bar and turn. .