The DeWALT D25960K 40-lb Demolition Hammer is powered by a 15-amp motor that delivers 1,460 beats per minute. The hammer's active vibration control includes a counterbalance mechanism and a shock-mounted floating handle to dampen user vibration levels. A soft start reduces bit walking and prevents high-current spikes on startup. The hammer accepts both collared and non-collared 1/8-in. bits. DeWALT; 800-433-9258; www.dewalt.comThe Milwaukee six-in-one Combination Pliers is designed to perform the same tasks as needle-nose pliers, a wire stripper and a metal deburring tool. The pliers also feature integrated Nos. 6 and 8 bolt cutters. The tool can strip solid wires
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.