1.Multi-type: As shown in the picture, we have a variety of models for you to choose from, the accurate model allows you to have a good experience.

2.Good quality: The Carbon Steel Setscrew Type Collar will keep sturdy when tightened and is specially designed not to damage the bits.

3.Advantage: Adjust quickly and easily by using a wrench at any point on the drill bit groove/shaft of the drill stop ring, to obtain precise drilling depth.

4.How to use:1) Slide the correct size drill stop to the desired depth of the drill bit. 2) Align the locking screw with the pad (body). 3) Use the included wrench to tighten the set screw. 4) Remove wrench before using.

5.Rang of application: It is so perfect for machinery shaft instruments or on woodworking tools as a bit limit ring and it can be used about twist or brad point drills bits or any kinds of bit to prevent excessive drill bit penetration and for any job that uses a bit and needs something precision.