Stamped for easy ID. Installers have a steel ball to prevent overtightening. The stainless steel body is 1.75″ overall length and uses a 3/4″ wrench or socket to tighten.

Available in sets or individual.

Sizes: 1/4-20, 1/4-28, 5/16-24, 3/8-16
3/8- 24, 7/16-20, 1/2-20, 9/16-18