3PCS, SPIRAL STEP DRILL SET HSS TIN 4.0-12.0 MM,4.0-30.0 MM,6.0-38.0 MM

77803

• Intended for metals, thin-walled steel sheets, plastics. The edges of the drill hole remain clean and burr-free The drill bit will not run off on rounded surfaces Self-centering on rounded and slippery surfaces. Rapid heat dissipation when drilling in hard materials Made of HSS 4241 high speed steel, coated with titanium nitride Cylindrical handle 77,800 - 4,6,8,10.12 77801 - 4,6,8,10,12,14,16,18,20,22,24,26,28,30 77802 - 6,8,13,16,19,21,23,26,29,32,35,38