rger than 3/4" and drove lag screws larger than 1/4" diameter. But it worked great with screws and smaller holes. • Since the chuck is so close to the clutch and has a smaller diameter, we found it difficult to tighten the jaws on small drill bits. Also, the drill's drive-train does not automatically lock, so this added difficulty when trying to tighten the jaw system. • Charging batteries took 60 minutes to fully charge a battery pack.