HIGH QUALITY: Superior quality aluminum alloy is used to ensure a light weight but super high strength support DESIGNE: Advanced CNC (Computerized Numeric Control) machine systems provide precise dimension to fit perfectly DURABLE: Aluminum Anodized surface treatment assures years of corrosion and abrasion-resistant operaton COMPATIBILITY: Compatible With Arca-Swiss Standard for Tripod Ballhead for Camera Tripod Ball Head, Anti-twist locking screws match the international standards ANTI-SLIP RUBBER PADS: Special anti-slip rubber pads enhance the grip between each plate and the mounted gear, and protect the gear from any damage due to mounting