Decking Clips for Chain and Wire. Girder Hole Size 7mm. Chain/Wire Hole Size 6.5mm. Length below Girder 45mm. Load Rating 45kg for Girder Thickness 0.8-2mm. Load Rating 90kg for Girder Thickness 2-3mm. Zinc silver colored sacrificial coating (Z600+), waterproof topcoat, for use in indoor and outdoor humid and mildly corrosive environments. Coating is completely chromium free.