This package of Kadee? products is designed to assist the beginning model railroader in learning the basic modeling skills of proper coupler mounting and use of the Kadee? Magne-Matic? coupler system. The following items are a basic selection of assorted couplers and related products that should be enough for the beginner to acquire the knowledge needed for proper coupler selection and mounting. Contains: Instructions and Helpful Hints HO Coupler Conversion List and Coupler Primer #5 2 Pair of Couplers, All Metal Medium Centerset #47 2 Pair of Couplers, All Metal Medium Underset #46 2 Pair of Couplers, All Metal Long Centerset #43 2 Pair of Couplers, All Metal Short Centerset #42 2 Pair of Couplers, All Metal Medium Overset #205 Multi Purpose HO Coupler Height Gauge #208 .010? Thick Fiber Washer Shims (4 doz.) #209 .015? Thick Fiber Washer Shims (4 doz.) #211 Plastic .010? and .015? thick Shims (20 ea.) #231 Greas-em Dry Graphite Lubricant #237 Trip Pin Pliers #241 ?Dual? Tool (Manual Uncoupling Tool & Spring Pick) #256 Plastic 1/2? x 2-56 Screws (1 doz.) #321 Permanent Magnet Uncouplers (1 pair) #334 Gluing Jig