Assortments like this are handy to carry with you because it is often not possible to predict which sizes will be required at the job site.

High density (HD) packers are designed for heavy loads such as concrete units, metal girders (RSJ), beams, joists, large window units, etc.  

They have a maximum load capacity of 2.5 ton and are easily stacked having locating spigots so as to resist lateral slippage under the load

A lattice of preformed holes allows for easy fixing if required.

Assortment as follows:
70 x 2mm, 70 x 5mm, 60 x 10mm, 20 x 20mm