Bosch BL4143 Features

• Bosch black oxide bits offer superior durability, speed and selection for most general purpose applications. Best for cutting holes into metal and work equally well in wood and plastic drilling. Use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials.
• Speed helix design penetrates 3X faster than standard bits
• Triple tempered black oxide coated bits last 50% longer than regular high speed steel
• 135° split point starts on contact with no walking or skating and no center punch is required
• Easier drilling, reduced heat and extended drill bit life