Easy , suitable for homeowners , carpenters , mechanics , artists , and amateurs The 25Pcs Screw Extractor Set is a must-have for any DIY-enthusiast or professional , providing a quick and easy solution for stripped or bolts and screws The internal thread with reverse spiral-flute design to down to provide gripping power With its compact and portable storage box , this set can be taken , making it ideal for use in the garage , workshop , or on-the-go repairs Made from CR-MO steel and reaching a high hardness , this set features a head multi-spline design that ensures a secure grip on even the most stubborn fasteners, Manufacturer: Watreketal