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Internet # 203310604

Model # 646-9/16-INS

9/16 in. Insulated Nut Driver with 6 in. Hollow Shaft- Cushion Grip Handle

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  • Nut Driver's 6 in. hollow shaft is ideal for long bolt work
  • 9/16 in. hex driver has cushion grip handle
  • Two-layer insulation safeguards you from electric shock
  • View More Details
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Product Details

About This Product

The Klein Tools Insulated 9/16-Inch nut driver features two layers of insulation to provide protection against electrical shock. The thick, exceptionally tough, high-dielectric white inner coating is bonded to the tool. The bright orange outer coating is flame and impact resistant.


  • Individually tested to exceed the IEC 60900 and ASTM F1505 standards, for insulated tools, and clearly marked with the official 1000-volt rating symbol
  • Two layers of insulation provide protection against electric shock
  • Thick, exceptionally tough, high-dielectric white inner coating is bonded to the tool, and a flame retardant, impact-resistant, bright orange outer coating
  • Hollow shafts make it possible to work on stacked circuit boards or other long bolt applications
  • Made in USA
  • Tip-Ident quickly identifies nut driver size
  • Cushion-Grip handles for greater torque and comfort
  • Shop Klein Tools Nut Drivers here
  • Click here for more Klein Tool products
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Product Information

Internet # 203310604

Model # 646-9/16-INS


Dimensions: H 11.38 in, W 1.4 in, D 1.4 in


Drive Size

9/16 in

Handle Length (in.)


Product Depth (in.)

1.4 in

Product Height (in.)

11.38 in

Product Width (in.)

1.4 in

Shaft Length (in.)



Color Family


Drive Type


Electrical Tools Features

No Additional Features

Hand Tool Type

Individual Nut Driver

Handle Material

Comfort Grip



Number of Pieces


Pack Size




Tools Product Type

Hand Tool

Warranty / Certifications

Manufacturer Warranty

Please refer to the attached warranty document in the Product Overview section above under Info & Guides.

Questions & Answers

Q:Over all length?
by|Mar 28, 2018
2 Answers
Answer This Question

A:  The overall length of the Klein Tools model # 646-7/16-INS Nut Driver is 10.31 in.

by|May 5, 2023

    A:  The overall length is 10.31 inches.

    by|May 5, 2023
      Showing 1-1 of 1

      Customer Reviews

      4.7 out of 5

      • 4.7 out of 7 reviews
      • 100% recommend this product
      Filter by:
      Showing 1-7 of 7 reviews
      • Verified Purchase
      Wish it had a magnet to hold the screws
      • Verified Purchase
      Insulated but drivers are an elevator guys blessin
      [This review was collected as part of a promotion.] They save you from shorts. I appreciate these and I think Klein is innovative and keeps ahead of the game, any ideas I have I’d send to you guys in terms of helpful tools
        • Recommended
        5 Star Review
        Rating provided by a verified purchaser
        • Verified Purchase
        It is exactly what I needed works perfectly with the insulation that the company I work for requires.
          • Recommended
          This product is the correct size I needed
          The size of the product is the exact fit to most HVAC things
          • Pro
          • Verified Purchase
          • Recommended
          This product is exactly what it says it is
          Insulated and perfect for the job as an HVAC personel
          • Pro
          • Verified Purchase
          • Recommended
          Showing 1-7 of 7 reviews