100% Metal,6mm manual welding technology,Ultra Sturdy: Made by 6mm manual welding technology. Up to hold 80Lb that we had test, even you hold 4 sledgehammer.,Installation Easy: Install finished within 5 minutes. Packing with plastic anchor and screw kit, Just marker the hole and mount the organizer to concrete wall or pegboard or wood wall.,Save Space: This multifunctional drill holder rack transforms spare space into a versatile power tool storage organizer that keeps your usual tools organized and within arm’s reach.