Strong Material: Made of high hardness carbon steel, durable and wear resistant material, which can withstand strong impact, and has a longer service life | Precision Manufacturing: The tight clamping groove is very suitable for tightening or loosening the chuck, which can save time and effort to replace the drill bit | Easy to Use: If you don't know how to choose the right drill clip key, you can check the range mark on the front end of the drill to determine your real needs | Widely Application: In line with the market electric motorcycle, electric hand drill, aircraft drill and bench drill and other standard sizes,it can help you easily replace the drill you need | Thoughtful Service: Our drill chuck keys are available in two colors, 1 pcs black and 4 pcs yellow, total 5 pcs drill chuck key. If you have any question about our item, we will certainly seriously and solve all your problems and confusion