The cordless impact driver is the tool you need for tough screws. Impact drivers have the power needed and they use both rotation and concussive blows to get the job done. Unfortunately, impact drivers only know how to use brute force. Most impact drivers have no clutch. They can easily damage delicate material. For such jobs, use a combined cordless drills/driver or a cordless screwdriver. This makes the combination of a cordless drill and an impact driver very useful. A lot of vendors have combo kits, including both a drill and an impact driver.
Here are the most popular impact drivers at the moment.
DEWALT DC825B 1/4-Inch 18-Volt Cordless Impact Driver
Customer Rating: 4.89 out of 5
The DeWalt DC825B 18 Volt Impact Driver has a fantastic customer satisfaction. It is an incredible combination of power, compact size and light-weight. To make things even better, it is priced at a very competitive level. You get excellent value for your money. Quite clearly, this is one of the very best impact drivers on the market. Here you can read more about the DeWalt DC825B.
Makita BTD141Z 18-Volt LXT Lithium-Ion Cordless Impact Driver
The Makita BTD141Z is another impact driver with incredible customer satisfaction. Like the DeWalt DC825B it is very powerful, compact size and light-weight. But the Makita uses the better but more expensive Lithium-Ion batteries while the DeWalt uses the older Ni-Cad batteries. Here you can read more about the Makita BTD141Z impact driver.
Bosch PS40-2A 12-Volt Max Lithium-Ion Impact Driver
The Bosch PS40-2A Impact Driver is a very interesting driver for those who are looking for a compact and light-weight impact driver. It is significantly smaller and lighter than most of the competition but it is still a powerful impact driver. Despite its small size it is a very versatile tool. Here you can read more about the Bosch PS40-2A Impact Driver.
It has become popular to buy a combo kit, consisting of a drill and an impact driver. It is a kit for the professional user. Thanks to their popularity, a number of combo kits are available. Here are the most popular combo kits at the moment.
Makita LXT211 18-Volt LXT Lithium-Ion Cordless 2-Piece Combo Kit
The Makita LXT211 Cordless 2-Piece Combo Kit contains two excellent tools, the Makita BHP452Z (Hammer Driver-Drill) and the BTD141Z (Impact Driver). Although the combo kit is not cheap, you get excellent value for your money. No wonder this is a best seller. Here you can read more about the Makita LXT211 Combo Kit.
DEWALT DCK211S2 12-Volt Max Drill/Driver & Impact Driver Combo Kit
The DEWALT DCK211S2 Combo Kit includes the DeWalt DCD710 drill/driver and the DCF815 impact driver. They are smaller and lighter than their 18 Volt competitors but still very powerful tools. This kit is very good for those who want compact and light tools. Here you can read more about the DeWalt DCK211S2 Combo Kit.
Makita LCT203W 10.8-Volt Compact Lithium-Ion 2-Piece Combo Kit
The Makita LCT203W 10.8-Volt Compact Lithium-Ion Combo Kit is even lighter than the Makita DCK211S2 Combo Kit and it is cheaper. It is made up of the Makita DF030D driver drill and the TD090D impact driver. Two very compact and light-weight tools, 1.9 lbs & 2.0 lbs, you still get enough power for most tasks. Here you can learn more about the Makita DCK211S2 Combo Kit.