TCT Hole Saw Drill Bit 12 – 120mm Carbide Tip Alloy Stainless Steel Metal Cutter. Handle type: triangular handle. Scope of application: drilling of cast iron/stainless steel/aluminum alloy/non-standard metal die steel, etc. Features: accurate positioning, fast opening. Compatible equipment: hand drill/bench drill/magnetic drill. The power of the hand drill is more than 750w, and it is forbidden to use the impact drill. The larger the hole diameter is, the slower the rotation speed needs to be. If there is a stuck or labored, and it cannot be carried, please change to a higher power drilling rig. 100% Brand New And High Quality. Absolute guarantee of high quality and inexpensive! If you are not satisfied with the item, please contact with us. Any problem, please feel free to contact with us. We care about our valued buyers, if you have any questions, our Customer Service staffs will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. About item:For the functional products in our shop, we make sure that the functions are the same as description, but the actual color and shape may looks a little different from pictures because of the technical improvement and manufacturing variance.