Each Kit provides hardware and shim material to install one run of under-lane ball return track. Includes parts:9 ea, 049006358 Rail Connector Plate1 ea, 049006359 Rail Adapter Plate4 ea, 809849085 Hex Hd Cap Screw, 1/4-20 x 0.50 in. Gr8 40 ea, 809849125 Hex Hd Cap Screw, 1/4-20 x 0.75 in. Gr850 ea, 821142202 Hex Washer Hd Tap Screw, #12 x 1.25 in.4 ea, 839057002 Hex Lock Nut, 5/16-1840 ea, 948753101 Flat Washer, 1/4 in. SAE4 ea, 948964142 Flat Washer, 5/16 in. USS40 ea, 951148008 Split Lock Washer, 1/4 in. ANSI