






🔧 Drill smarter, not harder—flex your way through walls like a pro!
The YY-LC Flexible Drill Bit with Guide Ball Kit features a 0.5-inch carbon steel auger head and a 36-inch heat-treated spring steel shaft designed for flexible, self-feeding drilling. Ideal for pulling wires through walls without damaging surfaces, it includes an adjustable guide ball for precise control and fits most standard drills. Engineered for strength and durability, this tool accelerates wire installation with professional-grade performance.





| ASIN | B0CR3ZTDYJ |
| Best Sellers Rank | #16,858 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Installer Drill Bits |
| Brand | YY-LC |
| Brand Name | YY-LC |
| Customer Reviews | 4.2 out of 5 stars 193 Reviews |
| Cutting Diameter | 0.5 Inches |
| Included Components | 1 * Flexible Installer Drill Bit , 1 * Guide Ball Kit |
| Manufacturer | YY-LC |
| Material | Carbon Steel |
| Material Type | Carbon Steel |
| Minimum Bore Diameter | 0.5 Inches |
| Model | B0CR3ZTDYJ |
| Number of Flutes | 1 |
| Point Style | Screw Point |
| Shank Type | 3-Flat |
| Surface Recommendation | Wood |
| Tool Flute Type | Spiral |
| Unit Count | 1.0 Count |
P**O
Something everyone that does DIY products needs this.
I love using this! When you have to make holes through 2 by 4's and you do not want to go to close to the edge and possibly go through the other side. The guide ball is the best size and works easily. I cannot tell you how many times I have used this and never had an issue
H**N
This is a grand piece of equipment, and I have found no equal.
So happy with my 6' 3/4" drill bit. I have used these long drill bits, off and on for abt. 30 yrs. But in the past I have only been able to find them with a very slender business end, perhaps 3/8", maybe a little more. I just "got by" with these for threading the slender wires needed for burglar alarms, telephones, etc. But those bits would often drill down and become embedded in wood and sometimes break off. I had no idea I could get a 3/4" until I began looking for something that I could get to drill a path hole large enough to accommodate the connector heads on Cat 6a ethernet cable. It was easy and the cable just dropped thru the path I made. Of course you never know what you will hit drilling blind, only by the sense of touch. But I was lucky and didn't hit a nail and this bit drilled down thru 10 inches of wood (thru a 2"x4" board lying flat against 2"x8" floor joist) all the way to a cement foundation. I went slow and when I hit cement, I knew it. Of course, I stopped and went below my porch to see where the bit was. Didn't see it, but could tell it was completely embedded in the the 2"x8" floor joist. board. I pulled the long drill bit out; and took a 3" cookie cutter to cut a shallow exploratory hole into the floor joist and exposed the hidden path of my drill bit. Once it was exposed, it was easy getting the big connector heads on Cat6 ethernet from the height of a wall switch in my house down thru my porch which gave me a path to my basement. The shaft is very strong, never wobbled. I remember the slender light duty bits I used to buy years ago would wobble, often embed, and sometimes break. And I don't think I paid any more for this 3/4" drill bit than I paid for the more slender long drill bits I have used in the past. Apparently the last one failed and had to be discarded, as I couldn't find one. I put this new 6' long drill bit up for the next time I will need to sink a Cat6 cable down thru a wall. It looks as good as new. Don't hesitate to get this for pulling Cat6 cable.
K**N
Good but not as expected
Does a good job drilling inside of wall cavities however it is not as flexible as I thought it would be. Almost drilled through into a connecting bedroom. Lucky I caught it before going completely through. Damaged drywall when I used it on one 2X4 box opening as it does not bend at all going inside the wall.
S**L
Works
It bends! It drills! Yay!
D**N
weak
The bit snapped within few seconds of the very first use. It may be strong enough for the modern pine 2x4s, but is no match to any older weathered wood. ~$35 wasted.
F**D
Useful for specific conditions
Life saver, avoided a lot of repair work using this tool. Very useful for the right application
C**J
recommended 100%
Very flexible bit and it exactly 6ft long,
S**H
Works just ok
Works, but just ok. I splurged on this one because of the included guide ball. It turned out that the guide ball was pretty much useless. The rod is so stiff, it's difficult to get enough flex where the ball would be beneficial. I used this for two different wall wire pulls and both times it went through the edge of the wall/end plate. It didn't come out the other side of the wall and it did work. I just wanted clean holes directly through the end plates and I wasn't able to achieve that with this.
Trustpilot
3 weeks ago
2 weeks ago