2-in-1 Wet & Dry Drilling:; Supports both wet and dry drilling with a 2-4 in (5.08-10.16 cm) diameter hole capacity; includes a 2 in industrial-grade bit (1-1/4 in thread) for versatile use.Powerful 1550W Motor & Stepless Speed:; Delivers 1550W and 1880RPM for efficient drilling in reinforced concrete, stone, marble, ceramic, and more; variable speed lets you match material requirements.Effortless Drilling Design:; Features a rustproof steel output shaft for higher pressure tolerance, upgraded one-touch water connector, and shoulder rest for easier carrying and less fatigue.Comfortable Shoulder Rest & Handle:; Upgraded shoulder rest reduces effort; non-slip rubber handle minimizes vibration and can be positioned top, front, or rear for optimal comfort.Wide Application & Compact Size:; Ideal for home or professional use—drills concrete, red brick, marble, and more; perfect for installing AC units, pipes, stair rails, or highway repairs.