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Quantity
1
HSS and carbide construction ensures durability and long tool life
Compatible with KM Tool-less Countersinks for easy replacement
Available in multiple sizes to suit different screw types and materials
Accurately countersinks and drills holes for plugs and various fasteners
Works with both natural wood and composite decking materials
Summarized by Shop
These custom-designed replacement bits for the KM Tool-less Countersink feature high-quality HSS drills and counter bores with high-quality brazed carbide cutters. Order them as a discounted package or individually. Note that brazing may be a different color than the steel, and strong welds may be visible. Specifications:
Max counterbor
Material
HSS and brazed carbide cutters
Available bit sizes
1/4 inch countersink x 2mm drill, 3/8 inch countersink x 3mm drill, 1/2 inch countersink x 3.5mm drill
I really love the countersink tool. However, after less than 50 uses the drill bit snapped. These are not your standard drill bits (extra long and they have a flattened area on part of the shaft, so they have to be purchasded from KM tools). For all the great engineering that went into the countersink and for the high cost, you would have presumed that a better quality drill bit would have been included. When I called to see if they would send me a replacement, I got a definitive "no". I'm on the fence as to whether I would recommend this product as I don't know if the drill bit issue is going to continue to be a recurring problem. If this problem persists, the high cost of this product won't be worth it.
P
Pablo · August 28, 2026
Proprietary Bit
I do like the km tools countersink bit, however when the drill bit recently broke and I needed a new one I discovered it's a proprietary bit, which was a bit disappointing.