Experience stable and efficient drilling with the MYWISH 8-Piece High-Strength Eccentric Twist Drill Bit Set. The unique skewed head eccentric design ensures more stable positioning, less resistance, and an improved drilling effect. The drill tips are made from high-quality, fully polished material for clean, sharp, and burr-free penetration into various materials like brick, glass, tile, plastic, and wood. The hexagonal shank design provides a tighter grip in your drill chuck for safer, more secure operation. These bits feature precision-ground tips to prevent slippage and deflection, ensuring neat and fast drilling. This 8-piece set includes 4 sizes: 1/4 in. (6mm), 5/16 in. (8mm), 3/8 in. (10mm), and 1/2 in. (12mm), complete with a bit storage case.