For fast accurate alignment of flywheel pilot hole and clutch drive plate when assembling to car. Precision manufactured steel bushes with chemically blacked finish. Suitable for use on most cars and light commercial vehicles. Display packed in handy storage case. Contents: 8 x Pilot hole spacers 11, 12, 13.5, 15, 16, 17, 18, and 20mm, 8 x Drive plate spacers 15, 17, 19, 20, 21, 23, 24, and 27mm