Professional High-End Super-Magnetic Screwdriver Bit Set, 24 Pieces Sl/Ph Type, Length 25mm & 50mm, 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