High quality plastic wheel nut safety pointers, made from tough durable long-lasting material. These wheel nut markers have clear size markings to save confusion in the workshop. A great idea to assist in daily vehicle checks. Simply push onto wheel nuts and check points are pointing towards each other. When a nut moves the wheel nut indicator shows the movement. These Propoint wheel nut indicators are an excellent confirmation when used in conjunction with theProlock wheel nut safety clamps. The clamp does the hard work and the marker gives the assurance.