Our Garden Bed is galvanized steel, so it is rust-Resistant and corrosion-Resistant. And it is screw fixation. 

Features:

• Fabulous Planter Box: 48" x 36" x 12" square galvanized raised garden bed provides good drainage, keeps weeds out of the soil, repels insects and protects your plants; you can use this great gardening tool in your Grow your favorite plants on the patio.
• Made of Galvanized Steel: Anti-rust Safe Material; No Contamination to Soil, Safe for Plants and Humans; No Sharp Edges for Outdoor Bed Kits, Won't Hurt Your Fingers.
• The sheet metal is designed with a wavy structure for better compression resistance; thickened steel and reinforced corners can easily secure soil and plants.
• Just use screws to connect 4 parts, each part is clear at a glance; you can also invite your family to assemble this garden bed in minutes.
• The raised soil directly touches the ground, expelling excess water, protecting plant root health and allowing plant roots to grow freely.

Specification:

Color: Green
Material: Metal
Shape: Rectangular
Package Weight: 14 Lbs
Dimension: 48in x 36in x 12in
Planting Space: 11.4 cubic feet