Definition of "dykes"

If you use undersized dykes to cut large wire, you can damage or break them.

2008, John Hechtman, Audio Wiring Guide: How to Wire the Most Popular Audio and Video Connectors, page 15

For cutting lead came, you’ll need ‘lead came dykes,’ which are simple nippers designed to avoid crushing the lead.

2022, Neile Cooper, Kicking Glass: A Creative Guide to Stained Glass Craft, page 40