• effortless caster checking • Precise determining • may be used ahead & straight back • Fits X4 & X4F Precision moulded composite caster gauges for checking the caster angle of XRAY X4 & X4F. May be used both in the front side- along with the rear associated with the car. To be utilized alongside the HUDY Universal Exclusive Set-Up System For 1/10 Touring vehicles.