which nut driver does the valve core tool fit into. 1/4 inch, 5/16 inch, or the 3/8 inch.

It fits in the 1/4" chuck of the 3/8" end

Klein tools are supposed to have a lifetime warranty. How can i exchange it? The 5/16 nut driver part is wore out and doesn't work.

Contact Klein tool company directly. I believe they have a warranty department. They should be able to tell you their procedure for replacements.

How do I get to other screws?

The bits are in the long metal shaft. Pull hard on the metal shaft and it will pop out.

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Description

🔧 Master every twist with Klein’s 11-in-1 pro tool — don’t get left behind!

ERGONOMIC COMPACT - Designed for comfort and portability, perfect for fast-paced workdays.
PRECISION GRIP TECH - Blast finish bit tips reduce cam out, ensuring every turn counts.
PRO GRADE DURABILITY - Built with premium materials trusted by professionals since 1857.
ALL IN ONE POWERHOUSE - 11 essential tools combined for ultimate efficiency on the job.
HVAC INDUSTRIAL READY - Specialized bits for Schrader valves and broken core extraction.

The Klein Tools 32527 is a professional-grade 11-in-1 screwdriver and nut driver featuring blast finish bit tips for superior grip and reduced cam out. Designed specifically for HVAC and industrial applications, it includes unique bits for Schrader valve cores and broken core extraction. Crafted with premium materials and ergonomic design, this compact multi-tool delivers durability and precision trusted by professionals for over 160 years.

Specifications

ASIN	B004RIDKHQ
Best Sellers Rank	104,272 in DIY & Tools ( See Top 100 in DIY & Tools ) 129 in Nut Drivers
Brand	KLEIN TOOLS
Colour	Multi-colour
Country of Origin	Taiwan
Customer Reviews	4.8 4.8 out of 5 stars (4,335)
Global Trade Identification Number	00092644325274
Head Size	5/16"
Head Style	Square
Included Components	1 x Nut driver
Item Dimensions	12.7 centimetres
Item Length	7.75 Inches
Item Type Name	11-in-1 Screwdriver/Nut Driver with Bit for Schrader Valves Cores
Item Weight	200 g
Manufacturer	Klein Tools
Manufacturer Warranty Description	Klein tools warranty covers any defects in quality or workmanship. It does not cover a tool if the tool simply wears out or has obviously been abused. Our quality data demonstrates that we have very few quality issues. Those that we do find are addressed aggressively. Our quality is excellent because we use the highest quality materials and employ the most modern manufacturing and quality systems …
Material	Chrome Plated
Model Name	32527
Model Number	32527
Number of Items	1
Number of Packs	1
Part Number	32527
Recommended Uses For Product	Home Improvement
Set Name	11-in-1 Multibit Screwdriver/Nut Driver
Special Feature	Ergonomic
UPC	092644325274
Unit Count	8.0 count

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