Weighing just 2.1 pounds, this tool packs an impressive 170 in./lbs. of driving power. The tool’s innovative magnesium frame offers more durability than you’d expect from a tool this light. It drives 18-gauge brads from 5/8 to 2 inches in length. (For a bit less power and weight, this tool has a smaller brother, the BT125K-2, which features 145 in./lbs. of torque and fires brads from 5/8 to 1/1/4 inches.) An ultra-quiet rear exhaust rotates 360 degrees, which is great for working in tight quarters or around corners and odd-shape workpieces where it’s difficult to dodge discharge.