High quality: the high-quality aluminium alloy is used to ensure a light weight but a very high strength support Design: Well-machined metal construction provides precise dimension to fit perfectly DURABLE: Anodized aluminum surface treatment ensures years of corrosion and abrasion resistant operation COMPATIBILITY: Compatible with Arca-Swiss Standard for tripod head, anti-twist locking screw match international standards ANTI-SLIP RUBBER PADS: Special non-slip rubber pads enhance the handle between each plate and the mounted gear, and protect the gear from any damage due to assembly.