1. PE film or Kraft paper in anti-rust oil - keep air/water/humidity away, thus rust-proofing. 2. Bubble film - increases the impact resistance ability. 3. Rubber Slip or Corrugated Angle - gives special care to knife edges. 4. Wood Screws crates - makes opening easier without damaging the crates. 5. Corrugated boxes or plywood case - provide superior protection and stack-ability.