OTC's 525 Flange-Type Puller Combination Kit features two specialty pullers in one box Flange-type puller for removal of harmonic balancers, timing gears, and other parts with two or three tapped holes You also get a steering wheel, pulley, and flywheel puller Includes four sets of cap screws to fit most applictations - 3/8-16 UNF x 3.5 inches, 3/8-24 UNF x 3.0 inches, 5/16-18 UNF x 3.5 inches, 5/16-24 UNF x 3.5 inches Durable materials and quality engineering ensure ease of use and long term performance