Features: 1.New four slot eccentric drill bit,perfect for both professional construction and home DIY projects. 2.High performance drill bit and tap combination. 3.Titanium coating design,preventing overheating during prolonged use. 4.Unique thread cutting function for easy heat dissipation and chip removal. 5.Multiple sizes available: 1/8 ", 1/4", 5/16 ", 3/8", and 1/2 "bits. 6.Compatible with all standard drills including cordless, corded, impact, and hammer drills. Specifications: 1.Size: 1/8 ", 1/4", 5/16 ", 3/8", and 1/2 "bits. 2.Material: Alloy steel. 3.Screw head type: Cross groove. Package includes: 1. 1 set of high-strength 4-slot serrated eccentric drill bit kit,packed in a durable plastic storage case for easy organization and portability. 2. 1 Pair of industrial glove,protecting your hands from scratches during drilling and chip splashing. Declaration: 1.Due to manual measurement, there may be a slight error of ±0.1mm in the bit size, which does not affect normal use.Thank you for your understanding! 2.Due to differences in computer monitors and lighting, images may not display the actual color of items. 3.Due to collisions between drill bits during production, there may be slight scratches. Thank you for your understanding! 4.If you have any questions about product quality or usage methods, I will provide very detailed assistance to answer your questions.