Klein Tools NRHDM 5-in-1 mini square impact socket shown with detachable 7/16-inch quick-change hex drive adapter.
Klein Tools diagram detailing 3/4-inch, 1-inch, and 1-1/8-inch square socket sizes with dual hardware alignment slots.
Klein Tools NRHDM mini impact socket fitted with a 7/16-inch hex adapter showing color-coded size identification rings.
Close-up of Klein NRHDM slotted socket head engineered to drive utility eye bolts and curved pole steps without damage.
Front view of Klein NRHDM 5-in-1 socket opening showing stepped square broaching and deep hardware alignment drive slots.
Direct end profile of Klein NRHDM showing hollow pass-through barrel designed to clear long threaded bolt studs aloft.
Lineman using compact Klein NRHDM socket on an impact driver to fasten pole hardware in tight crossarm clearances.
Aerial utility worker driving wooden crossarm bracket hardware overhead using the compact Klein NRHDM impact socket.
Lineman holding the compact 1.36-lb Klein NRHDM socket in insulated gloves for rapid tool swaps in an aerial bucket.
Klein NRHDM alignment slot engaged on a heavy utility pole eye bolt to torque hardware flush into wood framing.
Lineman driving a heavy-duty steel eye bolt into a wooden utility pole using the slotted end of the Klein NRHDM socket.
Lineman torquing a curved utility drive hook into a power pole using the narrow alignment slot on the Klein NRHDM socket.
Klein NRHDM mini socket shown beside the standard-length NRHD socket, 7/16-inch adapter, and utility lineman impact gun.
Klein Tools NRHDM 5-in-1 mini square impact socket shown with detachable 7/16-inch quick-change hex drive adapter.
Klein Tools diagram detailing 3/4-inch, 1-inch, and 1-1/8-inch square socket sizes with dual hardware alignment slots.
Klein Tools NRHDM mini impact socket fitted with a 7/16-inch hex adapter showing color-coded size identification rings.
Close-up of Klein NRHDM slotted socket head engineered to drive utility eye bolts and curved pole steps without damage.
Front view of Klein NRHDM 5-in-1 socket opening showing stepped square broaching and deep hardware alignment drive slots.
Direct end profile of Klein NRHDM showing hollow pass-through barrel designed to clear long threaded bolt studs aloft.
Lineman using compact Klein NRHDM socket on an impact driver to fasten pole hardware in tight crossarm clearances.
Aerial utility worker driving wooden crossarm bracket hardware overhead using the compact Klein NRHDM impact socket.
Lineman holding the compact 1.36-lb Klein NRHDM socket in insulated gloves for rapid tool swaps in an aerial bucket.
Klein NRHDM alignment slot engaged on a heavy utility pole eye bolt to torque hardware flush into wood framing.
Lineman driving a heavy-duty steel eye bolt into a wooden utility pole using the slotted end of the Klein NRHDM socket.
Lineman torquing a curved utility drive hook into a power pole using the narrow alignment slot on the Klein NRHDM socket.
Klein NRHDM mini socket shown beside the standard-length NRHD socket, 7/16-inch adapter, and utility lineman impact gun.
KLEIN TOOLS

Klein Tools Impact Socket NRHDM 5-in-1 Mini Square Utility Wrench (7/16 Hex Adapter Lineman Pole Hardware Eye Bolt Hollow Shaft Fastening Steel)

Only 2 left
SKU: NRHDM
$149.99 USD

Description

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Klein Tools NRHDM 5-in-1 Mini Square Lineman Impact Socket Wrench

The Klein Tools NRHDM 5-in-1 mini square impact socket fastens utility pole hardware, tightens crossarm brackets, secures J-hooks, and installs hot-line clamps in confined aerial power distribution environments. Sized in a compact 4.5-inch profile weighing only 1.36 lbs, this multi-head impact accessory incorporates 3/4-inch, 1-inch, and 1-1/8-inch square socket interfaces alongside dual alignment slots to engage pole steps, drive hooks, and eye bolts. Featuring a 13/16-inch hollow pass-through barrel that clears extended bolt shanks, an impact-rated steel build certified to ASME B107.110 specifications, and a fine-tuned 7/16-inch hex ball-detent quick-change adapter, it provides electrical linemen and utility crews with glove-friendly, multi-size fastening agility.

Best Used For:

  • Utility Pole Hardware and Hot-Line Clamp Installation: Driving 3/4", 1", and 1-1/8" square nuts on utility distribution poles and transformer mountings without manual socket changeouts.
  • Curved Eye Bolt, J-Hook, and Pole Step Alignment: Torquing specialized curved suspension hardware and lag hooks using the integrated small and large alignment drive slots.
  • Confined Crossarm and Aerial Reach-Around Work: Navigating crowded transformer banks, congested crossarm structures, and bucket truck clearances using the compact 4.5-inch barrel.

Key Performance & Safety Features

  • Glove-Friendly Multi-Socket Sizing: Rapidly transitions between 3/4", 1", and 1-1/8" square hardware without requiring linemen to remove protective rubber high-voltage gloves.
  • Dual Utility Alignment Slots: Machined large and small engagement slots seat and drive pole steps, eye bolts, J-hooks, and drive hooks directly under heavy impact torque.
  • 4.5-Inch Compact Hollow Shaft: 13/16-inch inside diameter hollow core clears protruding threaded bolt ends and long all-thread rods during pole framing tasks.
  • ASME B107.110 Impact Steel Construction: Heat-treated alloy steel structure withstands continuous high-torque cyclic shock from commercial utility impact drivers.
  • Fine-Tuned Ball-Detent Adapter: Included 7/16-inch quick-change hex adapter features optimized ball retention to prevent socket separation and drop hazards aloft.
  • Color-Coded Identification Lines: Distinct color bands provide instant visual distinction between square socket dimensions and slotted hardware interfaces in low light.

What's Included

  • (1) Klein Tools NRHDM 5-in-1 Mini Square Impact Socket Wrench
  • (1) 7/16" Hex Quick-Change Impact Drive Adapter (Cat. No. NRHDA)

Technical Specifications

Manufacturer Klein Tools
Model / Part Number NRHDM
Product Classification 5-in-1 Mini Square Lineman Impact Socket Wrench
Square Socket Sizes Included 3/4", 1", and 1-1/8" Square (4-Point)
Hardware Alignment Features Small and Large Alignment Drive Slots (Eye Bolts, J-Hooks, Pole Steps)
Drive Interface Size 7/16" Hex Quick-Change Shank & 1/2" Square Female Drive
Overall Barrel Length 4.50 inches (11.4 cm / 114.3 mm)
Hollow Barrel Clearance Diameter 0.8125 inches (13/16 in / 20.64 mm)
Regulatory Manufacturing Standard ASME B107.110 Impact Tool Specifications
Socket Body Material High-Strength Forged Impact-Grade Alloy Steel
Overall Tool Dimensions (L x W x H) 4.50 in x 1.90 in x 1.90 in (11.4 cm x 4.8 cm x 4.8 cm)
Total Net Weight 1.36 lbs (21.76 oz / 617.0 g)
UPC Barcode 092644652721

Pro-Tip: Use the deep alignment slots when driving curved pole steps or eye bolts into pre-drilled utility poles; the slotted head locks the curved steel securely to torque hardware flush without distorting the eyelet loop.