The M18 FUEL ¼ in. Hex Impact Driver is the fastest, most compact, and most powerful tool in its class. At only 4.59 in. in length, this cordless driver allows users to have more access in tight spaces. The 4 Mode DRIVE CONTROL provides greater control over output speed and power for greater versatility. The self tapping screw provides faster installation time by reducing stripping of fasteners. The POWERSTATE Brushless Motor delivers up to 30% faster driving speed, increasing users productivity.