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🔩 One socket. Infinite impact. Own the job like a pro.
The Klein Tools 66031 3-in-1 Slotted Impact Socket combines two common hex sizes (3/4" and 9/16") in a single, high-torque 12-point design with a patented coaxial spring-loaded adjustment. Crafted from durable alloy steel and optimized for impact drivers, this tool streamlines pole hardware installation and hot-line clamp adjustments. Trusted by professionals for over 160 years, Klein Tools delivers unmatched precision and reliability in a compact, versatile socket.

| ASIN | B08R6FL5P8 |
| Best Sellers Rank | #12,992 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #23 in Square Drive Sockets |
| Bit Compatibilities | impact driver |
| Bit Set Composition | Single Bit |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Customer Reviews | 4.8 out of 5 stars 984 Reviews |
| Drive Bit Shank Style | Standard |
| Drive System | Hex |
| Finish Type | Painted |
| Finish Types | Painted |
| Global Trade Identification Number | 00092644650871 |
| Included Components | 3-in-1 Slotted Impact Socket, 12-Point, 3/4 and 9/16-Inch |
| Item Length | 3.1 inches |
| Item Type Name | Sockets |
| Item Weight | 22.68 g |
| Manufacturer | Klein Tools |
| Manufacturer Part Number | 66031 |
| Manufacturer Warranty Description | Call vendor for warranty |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model Number | 66031 |
| Number of Items | 1 |
| Number of Pieces | 12 |
| UPC | 092644650871 |
| Unit Count | 1 Count |
W**Y
Works great has held up for years
Ive used it for a few years now its awsome i just love it.
J**D
Recommend for lineman
I am a lineman and this is a very useful socket.
S**E
great!
Son, an electrition on power poles says this has made a huge difference!
D**D
Socket
Great easy to use the durability is amazing love this brand will be purchasing from more the magnetic strength is great as well definitely worked for what I needed
A**R
Worth the price
Use it everyday
J**K
Lineman's buddy!
Great socket for linemen. Popped it on a M18 mid torque 1/2 impact and it's never left. It's become my go to socket for day to day distribution line work. Great for shoes, hotline clamps, cutout arms, you name it. Doesn't replace the nut runners or anything used on the 7/16 M18 Utility impact, but works great on a smaller, lighter impact for tasks that require more dexterity. Can't speak about long term durability. It's been in use on my truck for about 3 months with daily mild to moderate use.
S**E
Worth it I suppose
Got it for Overhead distribution line crew bucket. I am old school and came up with pop tools and hand tools. I dislike the time people waste changing out sockets and batteries with all the fancy gear offered nowadays. I used it and with our Milwaukee 1/4” impact set up with proper torque it worked pretty good. Gotta admit after a few uses it didn’t seem to grab the 9/16 nuts right off the first try but making sure you square up on it and attempting again it worked. This is why I gave it 4 stars. Ran the hotline clamps better than I expected though.
G**Y
Distro linemen have wet dreams about these
I've had a combo socket 9/16-3/4 and a slot socket for a few years now but this socket takes it up a notch. The Klein 3in1 9/16-3/4-slot socket is a dream for distribution work. Just keep this on your small impact and you won't have to change sockets or fumble with manual tools in rubber gloves nearly as as often. I'm cheap so I know the price seems steep but if you can only afford 1 socket get this one. You only have 1 set of hands so buy this and try to save them (rubber gloves and carpal tunnel are inevitable). I know this is a glowing review and all but if you use this socket hard for 9-12 months expect to replace it as it will wear/spread and bind up much faster than combo sockets without the slot. *Side note if you don't use hot taps or "coily macks" forgo the 3in1 socket and just get a combo socket as it will last longer. Good luck and be safe out there!
A**R
Multi-tasks
Douilles multi-tasks par excellence pour monteur de lignes!
H**O
Calidad
Excelente producto, muy recomendable y versátil
D**E
qualité/ prix
Très pratique et facile à utiliser
G**Y
Just what we needed
Bought this for use in powerline construction, fits 99.9% of the smaller nuts…there’s the odd 1/2” out there but not common enough to buy the socket kit
J**S
Lineman’s socket
Must have for lineman
Trustpilot
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