This Senzo DOT castor adjuster set provides varying amounts of front end castor adjustment for Tonykart (OTK) chassis which use a 10mm King pin. Adjusting the castor angle is key to obtaining optimum handling in different grip conditions.Fits all OTK chassis with 10mm king pinProvides varying adjustments to castor angleAllows for precise chassis set up for different track conditionsIncludes castor adjusting / rear bumper toolThe castor adjuster set includes 3 different pairs of adjusters:DOT 4 - Provides more castor than the standard OTK full castor kit. Ideal for wet conditions or low grip tracks where increased front end grip and turn in are requiredDOT 5 - Provides maximum castor angle for very wet conditions where maximum front end grip is needed.Centre (Blank) - Gives a castor angle in between standard zero and full castor. Ideal for where more release from rear corner grip is required.