22 piece Tapered Drill & Countersink Set. Seven tapered drill bits, seven Countersinks with drill depth stop, seven adjustable collars to control depth of Countersink and one allen key. For Drilling & Countersinking wood in one easy step. Single twist design efficiently ejects chips for cleaner holes. Made of smooth Drilling long lasting heat-treated steel. Sizes (Inch): 1/8 | 9/64 | 5/32 | 11/64 | 3/16 | 13/64 | 7/32. Size converted to metric: 3.175mm | 3.571mm | 3.968mm | 4.365mm | 4.762mm | 5.159mm | 5.556mm. Brand: Toolzone. .