Sealey HSS M2/4341 Step Drill Bits - Sealey AK4746, Three high-speed HSS 4341 straight flute step drills. Straight flutes for efficient swarf clearance. 18 Sizes covered by three drill bits. Supplied in a storage case. Sealey AK4746 HSS 4341 Step Drill Bit Set 3pc Double Flute