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CORTOOL Multifunctional drill bits set's body is made of high-strength steel, and the drill bit uses a high-hardness YG6X carbide tip, which has a longer service life and provides precision & fast drilling.
Spiral grooved flutes remove chip quickly. The tri-flat shank can fit most electric drills to ensure a stable and secure drilling. All bits have laser engraved sizes for easy identification!
With CORTOOL Multifunctional drill bits set, most DIY projects can be done, applicable but not limited to: Tile, Brick, Cement, Concrete, Glass, Thin Metal and Wood etc.
We recommended speed of drill set: 100-800RPM, the larger the diameter, the slower the speed requirement. The drill bit can be reused after grinding. If there is abnormal chip discharge, please remove the debris in time!
CORTOOL 10-Piece Multifunctional drill bits set Including various sizes to suit your DIY needs: 5/32", 3/16", 1/4", 5/16", 3/8" and 1/2".
Hao Nguyen
2025-09-06 11:02:07
Works perfectly. For the price, it doesn't exceptionally well. No issues. I have drilled about 15 holes using various sizes and they worked perfectly. Cuts fast. The bit sizes are Lazer etched at the top of the shank but very hard to read. I just used a caliper to read the diameter.
Ed4634
2025-09-05 13:13:40
Excellent product as expected
Customer
2025-08-08 13:37:36
I'm in construction and have used a lot of tile bits etc. I started off using the qrtr inch bits in the case and they worked well. I would stop every 30-45 seconds and dip it into water to clean it off. I drilled roughly 6 holes with it and it's still usable. However, the 5/16 bit didn't last at all. I got about 2 and a half holes with it and it was pretty much done. I ended up having to use the qrqtr inch bit and then step it up to the larger 5/16 in order to get all the way thru the tile. Haven't used the 1/2 inch yet but it's probably gonna be just like the 5/16. Not a bad set though. I've used other bits that haven't lasted near as long. I'd buy it again
LiveOutLoud
2025-07-24 17:16:41
Purchased this set to drill holes in the base of my concrete urn planters. No problem whatsoever.
Vikki
2025-05-01 17:33:38
My husband asked for these and uses them often!
Dakotah Eastman
2025-04-23 11:41:56
Been using these daily for months now. Still going strong
Excelente, calidad de material. Lo recomiendo
2025-03-30 12:53:26
Buenisimas cumple con lo estipulado
Robert H.
2025-01-24 12:49:44
Did not work for me. (SAD)
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