Generally used for horizontal restraint such as roof trusses, rafters and joists tied to masonry. 
Designed to The Building Regulations BS 5268 Part 3 and other building standards for horizontal restraint. 
Manufactured from galvanised steel to give a high level of corrosion resistance.
CE Standard BS EN 845-1:2013+A1:2016

Thickness: 4mm
Width: 27.5mm, (except 1600 size where width is 36mm)
Length of Bent: 100mm

Overall Length: 400mm to 1600mm

Bracket size means the thickness and overall length, each strap has a 100mm bend at the end, eg. the 600mm strap is a 500mm with a 100mm bend.