Size: 1/2″ – 21/20.5mm Yellow color Will suit Ford & 6 Stud LandCruiser stud patterns using standard nuts WS21Y You are Buying 6 off to suit 1off landcruiser wheel The REDCAT 1 Loose Wheel Indicators provide real time, between service constant visual indication of LOOSENING wheels and OVERHEATING brakes.For cost-efficient, effective and proactive fleet maintenance and increased safety, your wheel safety product must, at the very least, provide an indication of these issues between scheduled maintenance checks. This allows for timely scheduled intervention, minimising expensive part replacement and unscheduled downtime.