Manufactured in Sweden, the Bergström Quick-set Toolpost was of the standard Dickson type with a central block, machined on two sides to take a number of different toolholders. Once correctly adjusted, the tool was left in the holder and the pair could then be removed and replaced without the need for further adjustment - so completely obviating the need to fiddle with packing pieces. As with other types - the best-known of whom are British  "Dickson" with its similar dovetail clamping system, the American "Aloris" and Chinese piston types and three from Switzerland, the Tripan, Multiquick and famous Multifix. In order to get the best from any of these types, as usual,, a selection of extra holders was needed so that each commonly-used tool could be left in place ready for immediate use.
Bergström offered eight different sizes of block and associated holders to suit lathes from below 4.5-inch centre height to ones above 20 inches. In addition, the Company offered to modify, without cost, the central block to suit a customer's particular lathe. Ordinary and "double" toolholders to take standard, parting, boring and Morse taper bits were available, though not all could be supplied for each size of block - the chart below (published in the 1960s) shows the availability.
All makes of quick-set toolholder require careful handling for, while the larger sizes are largely immune to careless use, the smaller versions should be treated with care: it is not necessary to brutally yank up the adjustment and retaining screws; instead, just firm hand pressure will lock the units securely against the heaviest work.