The SSD SCX10 II AR44 HD Steel 6-Bolt Locker is precision machined from hardened steel and is designed to fit the stock SSD SCX10 II 6-bolt ring gear (SSD00181), and all the stock AR44 bearings and shafts. Features: HD Steel Locker for SCX10 II AR44 Axle 6-Bolt assembly for improved strength CNC Machined Hardened steel Fits SSD 6-bolt ring gear (SSD00181/SSD00349) Fit stock SCX10 II bearings and shafts Includes: (6) M2 x 8mm screws