Alfa Tools UNF 1/4-1/2 INSERT RANGE KIT

Helical Thread Insert National Coarse Thread Range Kit, Contains: 10 Inserts each 1/4"-28 (TI66221), 5 Inserts each: 5/16"-24 (TI66223), 3/8"-24 (TI66225), 7/16"-20 (TI66227), 1/2"-20 (TI66229), 1 Kit per Pack