Milwaukee Tools®
SHOCKWAVE Lineman’s 3-in-1 Transmission Utility Socket

Hi-Line Part-Number: MI49-66-5102


  • Provides more secure, efficient fastening in all fastening environments and orientations
  • 3 in 1 square design for single sided fastening, eliminating the drop hazard of removing the socket from the adapter to change sizes
  • Push and twist barrel lock allows for secure, one-handed size changes, even while wearing gloves
  • Interior debris shield that resists interior rust and corrosion from dirt, wood chips and moisture from the job site
  • Designed for the installation and removal of hardware on utility poles
  • For use 3/4", 1" and 1-1/8" square nuts
  • For use with 1/2"", 5/8" and 3/4" square headed machine bolts
  • Socket features a 1/2" square drive
  • 7/16" Hex to 1/2" square adapter for use with 7/16" quick connect chucks
  • Length: 8.81 "
  • Width: 2.44"


  • (1) SHOCKWAVE™ Lineman's 3-in-1 Transmission Utility Socket
  • (1) 7/16" Hex to 1/2" square adapter

List Price: Call for Pricing

California Proposition 65

PVC-coated Products; PVC-coated Wires and Cables

WARNING: This product can expose you to chemicals including DINP and/or DEHP, which are known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to or our information page: California Proposition 65.