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TYPE BLS A4 Liebig® Superplus

Simply the best heavy duty self-undercutting anchor in the world

  • Automatically self-undercutting, unique heavy duty anchor for push-through installations.
  • Simplest, quickest and safest solution on the market.
  • Economical: No special drill bits, undercut tools or setting tools.
  • Minimal expansion forces allow for small spacings and edge distances.
  • A4 for indoor, outdoor and industrial use.

Technical features

A4-80, threaded stud, nut and washer
Stainless steel, A4
Suitable conditions
Dry indoor / Humid indoor, rural outdoor / Outdoor


  • Power plants
  • Guardrails
  • Machines
  • Base plates
  • For dynamic and seismic loads
  • Small edge distances or spacings

Base materials

Approved for
  • Cracked concrete
  • Non-cracked concrete

TYPE BLS A4 Products

Type Code Eta approval Length Drill hole diameter Fixture thickness
M8-14/40/15 A4 9654404015 Yes 82 mm 14 mm 15 mm
M8-14/80/25 A4 9654080254 Yes 130 mm 14 mm 25 mm
M12-20/80/15 A4 9650080154 Yes 130 mm 20 mm 15 mm
M12-20/80/30 A4 9650080304 Yes 145 mm 20 mm 30 mm
M16-25/150/30 A4 9655150304 Yes 220 mm 25 mm 30 mm

Additional information