5/16″ Black Oxide SP 12″ Long (Carded)
The BOSCH line of countersinks is ideal for deburring and chamfering openings to previously drilled holes. Ideal for electrical, plumbing and HVAC contractors. BOSCH countersinks cut a variety of materials cleanly and precisely. With standard high speed steel and super hard titanium coated tips, these countersinks work very well on even the hardest materials.
From the Manufacturer
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.