Crafted from premium S2 alloy steel with a hardened core, this drill bit set ensures enhanced strength and reduced fracture risk. The black phosphate surface offers superior rust resistance, ensuring long-lasting durability even in challenging conditions. Ideal for circuit breaker maintenance, switchboards, and electrical housings, these precision-designed drill bits elevate your electrical repair and installation tasks. Upgrade your toolkit with this efficient and reliable electrician screwdriver bit set. This drill bit is a must-have for electricians working on circuit breakers, socket boards, and more. Compatible with electric screwdrivers, air drills, cordless drills, or any 1/4-inch hexagonal drills, it offers versatility and efficiency in various applications. The straight concentric shaft design of these drill bits ensures a secure grip without slipping or shaking. Safely lock screws in place without damaging them or the screwdriver heads, providing precise and reliable performance for your projects. Prioritizing user safety and efficiency, these drill bits come with anti-slip design elements and protective insulated rubber sleeves, reducing the risk of electric shock during operation. Item Name: Screwdriver Bit Material: S2 Alloy Steel Features: Rustproof, Long Lasting, High Durability Size Details: Total Length: 6.5cm/2.56" (Approx.) Total Length: 11cm/4.33" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: Style 5pcs: 5 x Screwdriver Bits Or Style 6pcs: 6 x Screwdriver Bits Or Style 10pcs: 10 x Screwdriver Bits Or Style 12pcs: 12 x Screwdriver Bits