Our Kit includes an 8620 Billet mainshaft to connect your NP203 to the NP205. These shafts are heat treated 8620 gear steel; they are super strong and super tough and made at our shop in Canada. We do NOT respline factory shafts. With our kit you can drop the clutch in confidence!**Our Billet Mainshafts are available separately for $299.00**Tapped Adapter Holes:Our adapter is tapped on the NP203 adaptor plate. This means you do NOT need one wrench on the bolt head and one on the nut. You simply tighten the bolts through the NP203 range box directly into the adapter. Its all in the details. Finally, And Certainly Not Least, CLOCKABILITYThe NorthWest FabWorks Dual Transfer case is the most versatile adapter for sale today, nobody even comes close to offering the options that our adapter kit does. First things first - What on earth is "clocking"? Clocking is the ability to mount (usually a transfer case in the 4x4 world) at different rotated position compared to stock. Rotating a transfer case up or down from the factory location has its advantages as well as downsides:Clocking your transfer case up is often done as it easily increases ground clearance under your transfer case. However it will also create steeper driveline angles on your front driveshaft. Steeper driveline angles require expensive driveshafts to run at the required angle. Clocking your transfer case down is sometimes necessary on vehicles with a large amount of lift. This is done to flatten driveline angles; however this is at the cost of ground clearance under your transfer case. Although some of our competitors can offer their adapters in a clocked position (usually at an upcharge!) or allow you to weld an adapter into a fixed position, none offer a truly versatile clockable and re-clockable adapter. Our adapter allows our customers to mount their transfer cases in various positions to find what works best for them. At any point you can disassemble the adapter, change the rotation, and try the new position in your rig.