Heller HSS Twist Drills With Reduced Shank - Heller 21552 7, This 15mm HSS twist drill from Heller has a reduced 10mm diameter shank which facilitates large-diameter holes in a small drill chuck and in hand drills.
Sold singly.
Heller 21552 7 0904 HSS Twist Drill With Reduced Shank 15mm - Single