About this item This fits your . Make sure this fits by entering your model number. PREMIUM QUALITY: Made of high quality high speed steel materials to ensure high hardness, rust resistance and durability. PREMIUM QUALITY: Made of high quality high speed steel materials to ensure high hardness, rust resistance and durability. MULTIFUNCTIONAL: Wide range of applications, suitable for hand held electric drills, electric drill racks, belt type mobile electric drills. PORTABLE: With a storage box design, the drill bits can be neatly placed inside, which is convenient to carry and not easy to lose. FEATURES: It's head adopt arc curve design, beneficial to chip removal, perforation is more efficient, more smooth, less noise. 5 DIFFERENT BORING DIAMETERS: 15mm, 20mm, 25mm ,30mm, 35mm drilling heads with different diameters can meet your different needs.