Enbiawit 33PCS Damaged Screw Extractor Set Stripped Screw Extractor Set for Broken Bolt, Screw Extractor Remover Tool with Socket Extension Bit, Easily Remove All-Purpose Broken Bolt, Stripped Screws

Warm Tips? 1. About improper operation: The drill bits in the kit are designed to be reverse blade. Different from normal drill bits, you need to REVERSE the bits to cut properly. Please change your operating habits. 2. About Using Bits: Some screws and bolts are exceptionally strong, especially the screws made of quenching steel. If the drill bits provided in the kit do not meet your operating conditions, it is recommended that you directly use other better bits when drilling is difficult. But please note that using the normal twist bits requires FORWARD rotary cutting. 3. About Rotate Speed: When operating the bits, especially the larger sizes of the bits, MUST LOWER the cutting speed (RPM?200) . It will be easy to cause bit fracture with too fast cutting or drilling, please lower the rotary speed. 4. About Using Rotary Tool: It is better to use the electric hand drill. Do NOT use the hammer drill.