Klein Tools Impact Socket Set 660KIT3 4 Piece Utility Lineman (1/2 Square 7/16 Hex Drive Slotted Square Hex Hardware Installation Tool)

Klein Tools 660KIT3 4-Piece Utility Lineman Slotted Impact Socket Set

The Klein Tools 660KIT3 4-Piece Impact Socket Set bundles the NRHDM 5-in-1 Mini Impact Socket and the 66044 3-in-1 Flip Impact Socket into a single high-torque driving kit engineered for electric utility pole line construction. Forged from impact-rated alloy steel with a protective black manganese phosphate surface finish, this 2.0 lb ASME B107.110 compliant set accommodates both 1/2-inch square and 7/16-inch hex quick-change drive connections on power tools. Featuring 12-point socket geometry and specialized side alignment slots, this combination allows linemen and utility technicians to service 3/4-inch, 1-inch, and 1-1/8-inch square hardware as well as 9/16-inch and 3/4-inch hex fasteners without taking off rubber safety gloves or detaching sockets from overhead impact wrenches.

Best Used For:

• Utility Pole Hardware & Eyelet Servicing: Tightening and loosening J-hooks, pole steps, eye bolts, and drive hooks using engineered side alignment slots.
• Hot-Line Clamp & Overhead Fastening: Operating safely on energized distribution line structures with gloves using a compact 4.5-inch hollow shaft for reach-around clearance.
• Square & Hex Bolt Drive Switching: Driving 3/4-inch, 1-inch, and 1-1/8-inch 4-point square nuts and 9/16-inch or 3/4-inch hex fasteners using high-torque 12-point socket geometry.

Key Performance & Safety Features

• 5-in-1 Mini Impact Socket (NRHDM): Features three primary square sizes (3/4", 1", and 1-1/8") with an alignment slot and a 13/16-inch diameter, 4.5-inch compact hollow shaft.
• 3-in-1 Flip Impact Socket (66044): Combines 9/16-inch and 3/4-inch hex sizes with an eyelet hardware alignment slot into a single reversible socket unit.
• High-Torque 12-Point Socket Geometry: Delivers versatile alignment angles for rapid positioning over both square fasteners and standard hex heads.
• Glove-Friendly Hands-Free Adjustment: Engineered mechanism allows operators to transition between drive sizes aloft without removing high-voltage rubber safety gloves.
• Dual Drive Tool Compatibility: Accepts standard 1/2-inch square drive impact wrenches and 7/16-inch quick-change utility impact power drivers.
• Black Manganese Phosphate Protective Finish: Industrial surface treatment provides long-lasting protection against corrosion, rust, and outdoor weathering.

What's Included

• (1) Klein Tools NRHDM 5-in-1 Mini Slotted Square Impact Socket
• (1) Klein Tools 66044 3-in-1 Flip Slotted Hex Impact Socket (9/16" x 3/4")
• (1) 7/16-Inch Quick-Change Hex Adapter Shaft
• (1) 1/2-Inch Square Drive Retaining Adapter

Technical Specifications

Pro-Tip: When installing curved eye bolts or pole steps on wooden cross-arms, position the side alignment slot directly over the eyelet loop before applying impact torque. This allows the socket body to pass over extended hardware shanks without binding or stripping threads.