I lost the 5/16 driver from the set. Can I order a replacement? Where?

Just do an Amazon search for "5/16 Klein nut driver" and it's like $10.

What sizes are these set?

the size's are 3/16 , 1/4 , 5/16 , 11/32 , 3/8 , 7/16 , 1/2

What sizes does this set have?

3/16, 1/4, 5/16, 3/8, 11/32, 7/16, and 1/2"

Are they made in USA?

Mine are clearly marked > Made in the USA!!

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🔧 Elevate your toolkit game—because every detail counts.

BUILT TO ENDURE - Internal flanges provide a twist-resistant shaft anchor for reliable, long-lasting performance.
COMFORT THAT LASTS - Cushion grip handles deliver superior torque and reduce hand fatigue during extended use.
PRECISION MEETS POWER - 7 essential hex nut sizes cover your most common fastening needs with ease.
COLOR CODED EFFICIENCY - Quickly identify sizes with vibrant handle-end color coding—no more fumbling in the toolbox.
REACH FURTHER WORK SMARTER - Full hollow shafts let you tackle long bolt applications without breaking a sweat.

The Klein Tools 631 Nut Driver Set features 7 hex nut sizes from 3/16" to 1/2" on durable 3-inch full hollow shafts, designed for long bolt access. Ergonomic cushion grip handles enhance torque and comfort, while color-coded ends speed up size identification. Built with alloy steel and internal flanges for twist resistance, this set is ANSI-compliant and engineered for professional-grade reliability.

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

S$151

Duties & taxes incl.

SINGAPOREstore

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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Manufacturer	Klein Tools
Part number	631
Item Weight	670 g
Product Dimensions	22.86 x 20.32 x 5.08 cm; 670 g
Item model number	631
Size	Non-Magentic
Color	Black/ Yellow
Style	Non-Magentic
Finish	Brushed
Material	Alloy Steel
Pattern	Tool
Shape	Rectangular
Item thickness	1 Inches
Power source type	corded-electric
Item Package Quantity	1
Head Style	Three-point, Hexagon
Measurement System	Inch
Specification met	ANSI
Special Features	Ergonomic
Specific uses	personal
Included components	630-3/16, 630-1/4, 630-5/16, 630-11/32, 630-3/8, 630-7/16, and 630-1/2.
Batteries Included?	No
Batteries Required?	No

Klein Tools 631 Tool Set, Nut Driver Set w/Hex Nut Sizes 3/16, 1/4, 5/16, 11/32, 3/8, 7/16 and 1/2-Inch on 3-Inch Full Hollow Shaft, 7-Piece

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