- ISS 150mm Impact Socket Extension Bar 3/4" Square DriveSpecial Price £28.01 £33.61ISS 1" Impact Socket Universal Joint Hole 1" Square DriveSpecial Price £58.10 £69.72ISS 3/4" Impact Socket Universal Joint Hole 3/4" Square DriveSpecial Price £39.22 £47.06ISS 1/2" Impact Socket Universal Joint Ball 1/2" Square DriveSpecial Price £15.98 £19.18ISS 1" Impact Socket Adapter Hole 3/4" Square DriveSpecial Price £21.79 £26.15ISS 1/2" Impact Socket Adapter Hole 3/4" Square DriveSpecial Price £14.37 £17.24ISS 3/4" Impact Socket Adapter Hole 1" Square DriveSpecial Price £13.94 £16.73ISS 3/4" Impact Socket Adapter Ball 1/2" Square DriveSpecial Price £11.33 £13.60