Use these different length extensions 90°or 45° drills. 1/4 inch -28 male threads and 1/4 inch -28 female threads on three different lengths: 1 inch 2 inch , 4 inch
Has a 5/16 quick change shaft on one hand and 1/4 -28 female threads on the other. Allows you to chuck threaded drill bits or countersinks into a quick-change chuck.