Your tonsils are gland-like structures in the back of your throat. You have one located in a pocket on each side. Tonsils are made of tissue that contains lymphocytes -- cells in your body that prevent and fight infections.onsil stones, or tonsilloliths, are formed when this trapped debris hardens, or calcifies. This tends to happen most often in people who have chronic inflammation in their tonsils or repeated bouts of tonsillitis.
A self-centering chuck, also known as a scroll chuck, uses dogs (usually called jaws), interconnected via a scroll gear (scroll plate), to hold onto a tool or workpiece.
45105 â 5/64â³ Self-Centering Hinge Bit. I have been using the Snappy quick change system on my cordless drills for many years. I use the complete set of Drill Bit Adapters and Gold Screw Countersinks. These are a great time savers and very versatile. I have used the 1/4 drill adapter to hold many other cutting tools. The combination drill and countersinks make the process of drilling screw holes very easy and accurate.