Features: High hardness stainless steel bristles effectively remove stubborn oxidation and rust from phone motherboard pad and IC pins, ensuring a clean surfaces for precise soldering and improved repair success rates. Compact conical/flat brush heads with reinforced handles enable precise cleaning in narrow gaps beneath chips and connector sockets, eliminating dust and solder residues. Ideal for professional technicians and DIYer enthusiasts handling electronics maintenance, these brushes meet rigorous demands for delicate component cleaning during phone/device repairs. Use this 4 pack multi shape brush set (steel/copper bristles, varied thickness) to tackle full process tasks scrape oxidized contacts, clear flux residues in tight spaces, and polish intricate circuitry. Engineered with ergonomic grips and abrasion resistant steel coiled bases, these cleaning brushes withstand repeated scrubbing while protecting fragile capacitors/resistors from physical damage. Specifications: Product brush head component: thin steel wire + bristle Size: Approx.12x42x5x8mm/0.47x1.65x0.19x0.31inch Size: Approx.13x44x5x10mm/0.51x1.73x0.19x0.39inch Package Includes: 4pcs Phone Repair Brushes note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.