This is a replacement clutch disc for the 3D Manual Clutch. Two clutch discs are required per clutch.
To replace the discs, you need to compress the clutch, such as with the 3DME service tool. Otherwise, the bolts are under lots of tension. And, you can't thread those bolts back in without compressing the clutch.
![[09] Clutch Disc - 3D Motorsport and Engineering, LLC](http://3dmotorsport.net/cdn/shop/products/clutch_disc.jpg?v=1456704685)
![[01] Clutch Basket - 3D Motorsport and Engineering, LLC - 1](http://3dmotorsport.net/cdn/shop/products/DSC_0109_large.jpg?v=1456704601)