Ranking: * * * * * Best Overall Price: $350 Volts: 20 Battery: Li-ion, 3 amp hours 3/8-in. X 3-in. lags in pressure treated 4 x 4: 172 Chuck: One-hand insert, one-hand release. Likes: Light, tough, stubby, powerful. And with three speed-limit ranges, it's also precise. Dislikes: Minor complaint—sometimes we had to tap a bit with a hammer in order to remove the bit from the chuck.