Popular sized American made HSS drills in a blue anodized 3/8 diameter barrel with pocket clip which prevents rolling. Drills store neatly into the handle which is well-knurled for a perfect grip. All machined parts are rust-free aluminum except for the chuck which is black oxide tool steel. The chuck is pressed into the barrel so that it cannot turn and opens easily – never binds. The chuck can take drill sizes from No. 80 -.0135- to 52 -.0635-.