







🛠️ Elevate your toolkit with Klein — where heritage meets high-performance precision.
The Klein Tools 631 Nut Driver Set offers 7 of the most frequently used hex nut sizes with 3-inch full hollow shafts for extended reach. Featuring ergonomic cushion grips and color-coded Tip-Ident handles, this American-made set ensures quick size recognition, superior torque, and twist-resistant durability—trusted by professionals since 1857.












| ASIN | B0000BYEPS |
| ASIN | B0000BYEPS |
| Best Sellers Rank | #162,932 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #185 in Nut Drivers |
| Brand Name | KLEIN TOOLS |
| Color | Black/ Yellow |
| Country of Publication | USA |
| Country of origin | USA |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,242) |
| Customer reviews | 4.8 4.8 out of 5 stars (1,242) |
| Date First Available | 7 August 2012 |
| Department | Hex Nut Driver Sets |
| Global Trade Identification Number | 00092644650154 |
| Head Size | 3/16, 1/4, 5/16, 11/32, 3/8, 7/16, 1/2 inch |
| Head Style | Three-point, Hexagon |
| Included Components | 630-3/16, 630-1/4, 630-5/16, 630-11/32, 630-3/8, 630-7/16, and 630-1/2. |
| Is Discontinued By Manufacturer | No |
| Item Dimensions | 38 x 191 x 343 millimeters |
| Item Type Name | Nut Driver Set, 3-Inch Full Hollow Shaft, Sizes 3/16, 1/4, 5/16, 11/32, 3/8 7/16 and 1/2-Inch Klein Tools 631 |
| Item model number | 631 |
| Manufacturer | Klein Tools |
| Manufacturer | Klein Tools |
| Manufacturer Part Number | 631 |
| Material Type | Alloy Steel |
| Model Name | 631 |
| Model Number | 631 |
| Number of Items | 1 |
| Product Dimensions | 3.81 x 19.05 x 34.29 cm; 670 g |
| Recommended Uses For Product | Electrical work, DIY projects, Heavy-duty tasks involving various screw sizes and materials |
| Special Feature | Ergonomic |
| UPC | 092644650154 |
| Unit Count | 1 Count |
T**R
Good tools for what I need them for
A**X
Great to use such high-quality tools. I was happy to throw away my China made tools that I had used before.
J**Y
Typical Klein quality tools. Not the least expensive out there, but if you use your tools daily these are a bargain. They also have a lifetime warranty - no questions asked replacement. This set has a wide range of sizes, comfy handles that allow a solid grip, and both labeled and color-coded as to size for a quick grab.
M**.
Resistentes y a esta fecha no se han echo kada
W**T
They're Klein, and that typically means quality tools and this set doesn't disappoint. I keep the set in my Veto MCT bag which lives in my van and I only pull it out on big jobs. I think what sets Klein apart is the color and sizes on the handle tips, makes them easy to identify and pull from the bag. Quality is just superb and I like that the shank is hollow. Couple weeks ago was working in a cooler and had to replace a little evaporator blower fan. I grabbed the MCT bag and used this driver set because nothing else was going to make quicker work of it than these. The set offers up the majority of sizes that I'll ever run into so for me it was perfect. If your looking for a great starter set, new to the HVAC trade like I was when I purchased this is a great set to go with. Keep in mind this isn't the set with the magnetic tips, this is the hollow shank type which is very useful for removing nuts on bolts that are very long.
Trustpilot
2 months ago
3 days ago