15PCS Stripped Screw Extractor Set - Easy Out Broken Bolt Extractor Kit

Descripción

Product description WARNING: Not Recommended for Extremely Hard Alloy Steel (SAE 8, ISO 10.9/12.9) What Kinds of Screws Can Our Left-Hand Drill Bits Drill Through? 6542 HSS, with hardness HRC 63-66, is a general-purpose high-speed steel. It can easily handle metals with hardness below HRC 30, such as ordinary carbon steel, cast iron, copper, and aluminum. What Kinds of Screws Can Our Left-Hand Drill Bits Not Drill Through? Not suitable for drilling SAE Grade 8, ISO 10.9/12.9, or harder fasteners 1.Extremely hard screws (quenched/heat-treated steel) can reach HRC 50+. 2.Higher-grade alloys like 440 series stainless steel. So standard HSS drill bits won't work well. What Is the Green Center-Punching Punch Used For? Broken/stripped screws are smooth, so drill bits slip. Tapping the center punch with a hammer creates a center indent for accurate drilling, preventing wandering and protecting threads. Ensures alignment for removing stuck screws counterclockwise. Precautions for Using the Screw Extractor Set and Left-Hand Drill Bit Set 1. When using an HSS twist drill bit, set the drill to low speed for easier and smoother drilling into the screw. 2. Both the twist drill and the extractor rotate counterclockwise. When using an electric drill, set it to the reverse rotation. When Should You Stop Drilling? If drilling feels unusually difficult or produces a high-pitched noise, stop immediately—this usually indicates that the material is too hard for the drill bit.

Características

• 【Stripped Screw? Removed!】This easy out screw extractor set with left hand drill bits is specifically designed to remove stripped, broken, or damaged screws, studs, bolts, and fasteners — which cannot be removed with standard screwdrivers or wrenches, whereas hardened steel left‑hand drill bits can easily handle screws made from carbon steel, cast iron, copper, aluminum, and other similar materials.
• 【Tough & Break-Resistant】The left-hand drill bits are made of 6542 HSS (High-Speed Steel), offering hardness up to 63 HRC, better toughness, and resistance to high temperatures during high-speed cutting. The 135° split-point design makes drilling easier and reduces axial resistance. The extractors are made of 35# CR-MO steel, significantly enhancing strength, toughness, and heat resistance for long-lasting durability.
• 【Multiple Use Scenarios】This reverse screw extractor kit is a sturdy kit built for frequent, heavy-duty removal of broken screws — ideal for automotive shops, factory maintenance, construction sites, and mold repair. Covering most common industrial and household screws from M3 to M18, it's perfect for auto mechanics, industrial technicians, and home DIY enthusiasts.
• 【10+4+1 Professional Set】This 15‑piece easy out bolt extractor set includes: 1 center punch for precise starting point marking to prevent bit walking and slipping; 7 left‑hand drill bits in sizes 1/8", 1/8", 5/32", 5/32", 3/16", 1/4", and 19/64"; and 7 spiral flute extractors in sizes #1, #1, #2, #2, #3, #4, and #5. All tools are stored in a durable, sturdy storage case to prevent loss.
• 【Non‑Applicable Screws】Our left-hand drill bits have a hardness of HRC 63–66. They cannot handle extremely hard “top-tier” or higher-grade alloy/stainless steel screws, such as 440 series stainless steel. And this reverse drill bit set is designed for left-hand (counterclockwise) rotation. When drilling, set your power drill to counterclockwise rotation. A slower speed makes screw remov'al easier; high speed requires precise control to avoid bit wandering or breakage.

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