SDS-plus® Stop Bit 3/8 x1 1/16″
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 HCSTP2061 3/8 x1 1/16-inch Drop in Anchor Stop Bit.