Great British Steel: Made from British Grade 304 Marine Grade Stainless Steel. Easy Installation: To install, you will need to press all of the sleepers together. Press the two at the bottom together at the corner. Make sure the top layer is also pushed securely together. Then screw the plate to all of the sleepers. There should be at least 2 screws in each sleeper for a truly secure installation. Perfect Choice: InfiniBrackets are the perfect choice for Oak sleepers. Galvanised Steel will react with the acidity in Oak and other woods such as Chestnut and Cedar which will cause corrosion as they contain alcohols which affect the protective coating on Galvanised Steel. Versatile Functionality: These brackets can be used for a wide range of projects, some of which may include: Raised planters & flower beds, drive and pathway edging, retaining walls, decorative wood items, oak railway sleeper projects, and more. Dimensions: Width: 175mm - Depth: 175mm - Height: 100mm InfiniBracket Promise: All InfiniBracket railway sleeper brackets are all covered by a durability promise, we use these products ourselves and stand by their quality., Manufacturer: Indoor Outdoors