TREND 62006TC ADJUSTABLE COUNTERSINK 12 INCH DIAMETER They are designed to drill & coutersink 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 & 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 For replacement Twist Drills use slow spiral type eg Refs 50118 to 501716