13-Piece Anti-Tamper Star-Shaped Bit Set, 75mm Extended Length + Strong Magnetic Extension Rod, Made of High-Strength S2 Steel, Carbon Black Oxidation Treatment, Wear-Resistant/Impact-Grade/Rust-Proof, Suitable for Electric Drills/Homemade DIY (Self-Repair and Crafts)/Mechanical Repairs/Electronic Equipment Installation/Furniture Assembly