Size - Rod Dia(+/-0.3mm): 4mm / 0.16-inch; Width(+/-4mm): 40mm / 1.57-inch; Total Length(+/-10mm): 150mm / 5.9-inch Material - This garden staple is made of galvanized steel to prevent rust and increase durability. Design - Trapezoidal design garden stakes help add additional tension into the soil, quick and secure way to mount into the ground. Easy to install - The staple can insert deeply into the ground, easily penetrate grass barrier mat, plastic sheet, and heavy soil with the hammer. Application - U staples are widely used for securing turf, tents, grass fabric, landscape fabric, bark coverings, hoses, cable, artificial grass, and so on.