Features 1、Eccentric Drill Set: High strength eccentric twist drill bit, made of hard high speed tungsten steel M35, clean and incisive in drilling, and can penetrate metal, brick, glass, ceramic tile, plastic, wood and other materials. 2、Efficient and Accurate: The skewed head eccentric bit design ensures more stable locating, lower resistance, and better water drilling effect. The fine grinding drill tip effectively prevents slipping and deflection. 3、1/4 Inch Hex Shank: These eccentric bits features a standard 1/4 inch hex shank, making them easy to install on various types of power drills, hand drills, bench drills, etc. With a stable and reliable structure, and high efficiency. 4、Fast Chip Removal: The unique eccentric edges design can easily penetrate various materials, and the U shaped rotating groove effectively prevents chip accumulation and retention, ensuring neat and fast drilling. 5、Specifications: This kit provides 8pcs skewed head eccentric bits with 4 different sizes, namely 1/4 inch (6mm), 5/16 inch (8mm), 3/8 inch (10mm), and 1/2 inch (12mm), to adapt to different scenarios and meet various drilling needs. Specification Item Type: Eccentric Drill Bit Set Material: High Speed Tungsten Steel M35 Specifications: 2 each of 1/4 Inch (6mm), 5/16 Inch (8mm), 3/8 Inch (10mm), 1/2 Inch (12mm) Bit Total Length: Approx. 95mm / 3.7in Bit Working Length: Approx. 55mm / 2.2in Shank: Hex Shank 6.35mm (1/4 Inch) Compatible Devices: Hand Electric Drill, Rechargeable Drill, Bench Drill Use: Suitable for Glass, Ceramic, Porcelain Tiles, Granite, Concrete, Wood Package List 8 x Drill Bits 1 x Storage Box