
Using the Klein Tools JTH9M4 is easy. Just insert the 4 mm hex key into the fastener socket. The T-handle design gives you a lot of power, and the soft grips make it comfortable to hold. When using, make sure the key fits well to avoid slipping. For maintenance, keep it dry to prevent rust. After use, you can hang it up using the hang hole. This will help keep it organized and in good condition. And don't forget, the blade sizes are marked, so you can easily pick the right one for your job.