Install the Volquartsen CNC-machined 10/22 V-Locking Block for improved performance and accuracy. This part is machined from stainless steel and then hardened to Rc 40- 42. The combination of stainless steel and the heat treating process results in an extremely rigid and durable locking block! No more worrying about over tightening the retaining screws and cracking the factory issued V-Block.