Pot lead

1.Graphite, or black lead, often used on the bottoms of racing vessels to diminish friction.
References in periodicals archive ?
Abigail Brunton, three - perhaps Lanchester's youngest competitor - rode six-year-old brown Dartmoor gelding Rekcilf Jump Jet to win the Ponies UK Lobster Pot lead rein small breeds championship.
Over 100 colour photographs chronicle the evolving nature of Michael Simon's work, vividly showing the way that one pot leads to the next.