Avid Titanium Shock Set Screw Set for the Xray X4 includes (2) M3x8 and (2) M3x10 Ti set screws for the front and rear shocks offering you a lightweight replacement for the kit steel parts XRA901308 and XRA901310. Like all of our titanium parts made here at Avid RC, they are of the highest grade billet 6Al-4V Titanium to ensure the best strength possible.