Heavy duty wall mount steel pa speaker brackets the directional mounting bracket allows both horizontal and vertical tilt adjustment cw hex keys and spanner to tighten back plate 122 x 254mm with 4 x 10mm mounting holes arm length max distance from back plate to centre of 35mm pole 345mm mounting pole 35mm diameter fits most standard speaker top hats horizontal and tilt adjustment max load 35kg we suggest use of bond it epoxy chemical fix injection type quick drying anchoring resi