UNIBITS STEP DRILL

NO.1 Step Drill Bit(1/8" to 1/2" hole range). High-Speed Steel Knock-Out Drill Bit features 13 hole sizes ranging from 1/8 - 1/2 in. The single-flute design lets you drill true, round holes every time and gives you ultimate control over the drill progression. Requires minimum chuck size of 1/4 in. Drills holes ranging from 1/8 - 1/2 in. in metal and plastic High-speed steel Single-flute design lets you drill true, round holes every time and gives you ultimate control over the drill progression 1/4 in. hex-shaped shank secures easily in the drill and makes it compatible with any 1/4 in. quick-change adapter Sizes are laser-etched inside the flute so you know exactly when to stop drilling