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1/4", 3/8", 1/2" Extension and Adapter Set - 16 Pieces



Save time and eliminate frustration with Seattle Tool’s collection of extension bars and adapters.


  • Full complement of drive adapters (½” to ⅜”, ⅜” to ½”, ⅜” to ¼”, ¼” to ⅜”)
  • Complete set of universal joints in ¼”, ⅜”, and ½” drives
  • ¼” drive extensions in 50 mm, 100 mm, and 150 mm lengths
  • ⅜” drive extensions in 75 mm, 150 mm, and 250 mm lengths
  • ½” drive extensions in 75 mm, 125 mm, and 250 mm lengths
  • Cr-V with scratch, grease, and corrosion resistant satin finish


STEXB1275 1/2" Drive Extension Bar 75mm
STEXB12125 1/2" Drive Extension Bar 125mm
STEXB12250 1/2" Drive Extension Bar 250mm
STEXB3875 3/8" Drive Extension Bar 75mm
STEXB38150 3/8" Drive Extension Bar 150mm
STEXB38250 3/8" Drive Extension Bar 250mm
STEXB1450 1/4" Drive Extension Bar 75mm
STEXB14100 1/4" Drive Extension Bar 100mm
STEXB14150 1/4" Drive Extension Bar 150mm
STAD1238 Adapter 1/2"F to 3/8"M
STAD3812 Adapter 3/8"F to 1/2"M
STAD3814 Adapter 3/8"F to 1/4"M
STAD1438 Adaptor 1/4"F to 3/8"M
Universal Joints
STUJ12 1/2" Drive Universal Joint
STUJ38 3/8" Drive Universal Joint
STUJ14 1/4" Drive Universal Joint


The components of this product are covered by a lifetime warranty. Visit our Warranty page for a complete breakdown of our policy.