The Pentagon is asking Northrop Grumman Corp. for more of its JCREW signal jammers.

U.S. Navy SEALS and other U.S. forces will use the electronics to foil radio-controlled roadside bombs, or a related, newer threat: toy-sized drones that adversaries use to deliver explosives.

The Pentagon awarded Northrop Grumman (NYSE: NOC) a $23.2 million contract modification for JCREW electronics on Dec. 13. Nearly all of the work will be done in San Diego. Full-rate production is expected to continue to the middle of 2022.

The electronics are abbreviated JCREW I1B1, which stands for Joint Counter-Radio-Controlled Improvised Explosive Device Electronic Warfare Increment 1 Block 1.

The Navy awarded a $58 million initial contract in July, and followed it with a $267.7 contract in September.

The Naval Sea Systems Command of Washington, D.C. awarded the contract.