The majority of bicycle maintenance is detail work, and our precision 4.5mm Flat Blade Screwdriver is an ideal companion for bike shops, home mechanics and race-day service. Ergonomic file tread grip promotes control and comfort, helping to prevent hand fatigue. Plus, the magnetic tip is precision machined to exceed ISO standards and fit perfectly in component and accessory fasteners. This 3mm screwdriver includes a Shimano crank cap tool on the handle. Hardened CRV tool steel ensures longevity of precision tips. 4.5mm flathead exceeds ISO standards and serves countless service procedures. Magnetic tip helps hold screws flush and in place during complex procedures. Ergonomic file tread grips promote precision and control and prevent hand fatigue.