GUHRING Piloted Core Drill Bits, 1 Lot, 57 pcs. (10 pcs. 4.17mm , 20 pcs. 3.82mm and 27 pcs. assorted metric sizes), Left Handed, HSS, USA, New-Other: These are top of the line American made piloted core drill bits that came from a surplus purchase and lost in our warehouse. These are left handed HHS piloted core drills. Core drills are typically used for finishing and enlarging preexisting holes that have been drilled or punched. You can enlarge a hole up to 60% of the core drill diameter. These drill bits are sold with the Kent’s Tools 30 Day Satisfaction Guarantee.
