HSS drill set for thread inserts size M2, M2.5, M3, M4, M5, M6 & 1/4" - for drilling in plastic, PLA, PETG, ABS, steel, Aluminium, copper, brass & more (3.2 + 4 + 5.6 + 6.4 + 8 mm Ø)Specially developed for thread inserts:To create a perfect bore hole for threaded inserts, a drill of the appropriate size is required. Conventional drill sets do not operate these special sizes, which is why we have developed drills that produce suitable holes for threaded inserts.Perfect drilling performance:The HSS drills are suitable for use on a wide range of materials such as plastic, PLA, PETG, ABS, steel, Aluminium, copper, brass, nickel and zinc. The set includes 5 drills of between 3.2 and 8 mm diameter for the thread insert sizes M2, M2.5, M3, M4, M5, M6 and 1/4"Powerful:Thanks to the careful workmanship with a precise drill tip, the drill bits can be used with little effort. This makes work easier on one hand and ensures perfect drilling results3D printing:The special drill bits can be an advant