In summary:

Material: AISI-1022 heat treated carbon steel

Core Hardness: HV 390 - 420

Surface Hardness: HV 560 - 670

Wedge Test: 15

Torque Strength: 48kg/cm

Diameter: 8,10 G

Length: 32, 40, 45 mm.

Tensile: 34 N

Shear: 68 N

This is a link to the SHERA Board installation guide.

Screw holes can be pre-drilled but the 'W' range of screws are winged (hence 'W') and are self drilling. 

FIX-B20 - B means (drill) bit and 20 means length 20 mm

FIX-W32  - W means (drill) bit with WINGS and 32 means length 32 mm

FIX-W25 - W means (drill) bit with WINGS and 25 means length 25 mm

FIX-W45 - W means (drill) bit with WINGS and 45 means length 45 mm

FIX-T32 - T means Timber screw and 32 means length 32 mm

FIX-T45 - T means Timber screw and 45 means length 45 mm

NOTE: always check beforehand on availability to confirm stock.

The technical specs for screws (attached) and the building/application designs for your specific project(s) should be sufficient to determine the required screw.