| Base material | Concrete, solid masonry, or a hollow unit; include known condition. | An expansion sleeve needs a suitable body of material. A cavity is not solid concrete. |
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| Diameter and length | Nominal anchor size, fixture thickness and required embedment from the fixing detail. | Overall length is not effective embedment. A thick bracket consumes available length. |
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| Hole specification | Product-specified drill diameter, depth and drilling method. | A worn bit or enlarged hole can leave the sleeve without the intended contact. |
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| Edge and spacing | Distance to a free edge and neighboring fixings, using one stated unit. | Expansion can split vulnerable masonry or damage concrete close to an edge. |
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| Finish | Indoor dry use, damp exposure, or another stated environment. | Coated carbon steel and stainless steel are different material choices, not interchangeable labels. |
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| Load context | What is attached and whether the load is tension, shear, dynamic or overhead. | Capacity depends on the selected product and the full installation condition. |
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| Pack convention | Piece requirement and box quantity to be confirmed. | Compare the same included hardware and count before comparing box prices. |
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