Step drill : 6 Steps from 3/16” to 1/2” (3/16”, 1/4”, 5/16”, 3/8”, 7/16” 1/2”) 1/4” drive
Brand name(s) : LKG, Philmore

Features:
Two fluted cutting edges for faster smoother cuts
Made of high quality high grade steep 4241
Drill perfectly round holes
Titanium coated to reduce friction and heat