Spiral drill bit for 3.3 mm holes for M4 threaded holes. This drill bit is a German brand product. It has been precisely ground to its size. The drill bit is made of extra hardened steel with a titanium coating, making it extremely hard and additionally resistant to rust, acid, and heat. The surface is polished to a shine. The tip is ground to 118°, allowing for accurate starting of the hole. The drill channel is designed with a pitch of 25°-30°, which also helps to remove chips when working with thicker components. The dimensions of this component are standardized according to DIN 338. Technical details: Manufacturer: Ruko, Material: Steel with titanium coating, Length: 65 mm, Hole size: 3.3 mm, DIN: 338. Delivery includes: 1x drill bit, profile ground TiN 3.3 mm core hole M4.