Trend 6200/4 1/2in Professional TCT Adjustable Drill and Countersink Set 1/8in Pilot

Amazon

SIMULTANEOUS DRILLING & COUNTERSINKING: Designed to drill and countersink concurrently across a wide array of materials, including plywood, particle boards, and abrasive plastics. SUPPLIED WITH HSS DRILL: Comes with a high-quality HSS (High-Speed Steel) 3.2mm (1/8 inch) diameter slow spiral drill bit for durability in drilling tasks. TCT COUNTERSINK: Tungsten Carbide Tipped Countersink for long-lasting performance, with a diameter of 12.7mm (1/2 inch) for various countersinking tasks. FULLY ADJUSTABLE: Fully adjustable for varied project needs, a hex key is supplied for easy adjustments, offering flexibility and convenience in use. REPLACEMENT AND MAINTENANCE: Align drill flutes with countersink flutes for optimal use. For replacement drills, use slow spiral type (e.g. Refs 501/18 to 501/716).

Zoro Tools

They are designed to drill and countersink simultaneously, a wide variety of materials. Supplied with a HSS slow spiral drill bit. Fully adjustable, a hex key is supplied. The TCT version is used for plywood, particle boards and plastics (abrasive). Use at drilling speeds only. Not suitable for ferrous or non ferrous metals. Please ensure drill flutes are aligned with flutes of countersink.