Size: TT6, TT7, TT8, TT9, TT10, TT15, TT20, TT25 Product No.: 09701 Net Weight (kg): 0.08 Outside Length: 11.7 mm Outside Width: 5.2 mm Outside Height: 1 mm Introduction Made of S2 alloy steel through quenching, with center holes Matted chrome-plating treatment, stylish in appearance, strong rust-proof Hex keys easy to access and hard to fall off Butterfly-shaped cover, more fashionable in design