Upgraded Powerbox Conversion Attachment Set for 3/8″ and 1/4″ mini-head drive power ratchets-Model PBS-1438


NEW UPGRADED MODEL PBS1438 box wrench conversion attachment fits both 3/8 and 1/4 in drive mini head air or cordless power ratchets

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  • New Upgraded model replaces PBS 1420. Converts either 1/4″ or 3/8″ drive mini head air or cordless ratchet to low profile box wrench output. 1/4″ to 3/8″ drive adaptor includedA
  • Attachment fits most 1/4″ and 3/8″ power ratchets with round necks up to 1″dia with 1-1/2″min length. (see drawing above)
  • Quick mount design requires no modification to power tool
  • Increases  drive input torque  by 30%   (40 ft -lb max input)
  • Slim 1/2″ thick profile  gets in narrow and hard to reach areas that ratchet heads can’t fit or swing
  • Now you can POWER drive your larger size KD, GearWrench “Vortex”, Craftsman “Max Access”(tm) and simlar types of pass-thru (hollow) spline type sockets on the market too.
  • Sockets can be inserted and driven from either side of the head


  • 7 Piece low profile insert socket set with both Metric and SAE sizes
  • Includes  8mm-5/16, 3/8″.10mm. 11mm-7/16,12mm,13mm-1/2″, 14mm-9/16 and includes new 1/4 to 3/8 drive adaptor.
  • Sockets install from either side of drive head
  • Bottom-stop on all sizes cradles hex fastener and prevents fall-off
  • Slim 1/2″ depth fits into hard to reach areas where other sockets cant fit
  • Useable with many popular manual pass-thru ratchet handles too
  • Spill resistant plastic rack hold all components in lightly fitted pockets
  • Great for long thread application where sockets cant reach or manual ratchets cant swing

Additional information

Weight 1 lbs
Dimensions 5 × 5 × 2 in

Product Video