Non-slip worm drive. Precision manufactured from the finest British steels to BS 5315. Passivated zinc finish gives double protection. | For automotive, gas, plumbing and agricultural applications. | Both sets contain size 000 to size 8. (9 to 178mm diameter). | | Standards | • Conforms to to BS 5315 | | Notes | • Actual product may vary in colour between yellow zinc plated and plain silver zinc plated