JSSEVN - Set of 3 HSS spiral step drill bits, titanium cobalt conical cutter for drilling holes in plastic and brass, 4-12 mm / 4-20 mm / 4-32 mm

【Delivery】The drill bits are available in several sizes: The step drill bits are available in three sizes (4-12mm / 4-20mm / 4-32mm) to meet your needs. The drill bit sizes are clearly laser-cut, making precise drilling easy. The package includes a nylon bag.

【Premium Material】This Hex Shank step drill bit is made of excellent solid HSS steel and is titanium-coated, which is wear-resistant, corrosion-resistant, rust-resistant, sturdy, and durable for a long time.

【Helical Design】: The helical design makes cutting faster and smoother and prevents slippage. During drilling, the stepped drill bit automatically removes burrs from the hole and facilitates the cleanup of wood chips, making it the ideal tool for drilling holes. 【Easy to Use】: The dual-blade design allows for faster and more consistent drilling, eliminating stalling and resistance during use. It offers superior speed and accuracy. 【Widely Used】Quick-change drive tools are not only suitable for DIY enthusiasts but are also widely used in sheet metal work, sink installation, automotive repair, etc., for drilling holes in various materials such as sheet metal, aluminum, insulation board, PVC board, and wood up to 5mm thick.