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. Individual drills available in tubes of six. 12-piece Replacement Drill Set in Tube also available, DRL-245.13.