portable & lightweight the sds ultra mini electric drill pen is designed for on-the-go crafts. its compact size and lightweight construction make it easy to carry and use anywhere, whether you are at home, in the workshop or on the go. efficient drilling: experience efficient and accurate drilling with sds ultra. its adjustable speed (up to 900 rpm) allows you to adapt the drilling speed to different materials, providing smooth, accurate results every time. versatile drill bit set the sds ultra comes with a set of 10 drill bits in different sizes (ranging from 0.6mm to 2.2mm) with a 2.35mm diameter shank. made of titanium coated steel, these bits are very durable and ideal for working with wood, aluminum, plastic and even pcbs. convenient storage & easy bit replacement keep your workspace organized with the cnc alloy magnetic storage box that holds up to 20 drill bits. the special drill attachment design allows for quick and tool-free replacement of drill bits, saving you time and effort. long battery & fast charging - equipped with 500mah high-capacity lithium polymer battery, sds ultra ensures extended working hours on a single charge. the usb-c port allows fast and convenient charging, so you can resume projects without delay.