Jaw Boring Fixtures(3-Jaws) The Jaws Boring Ring (TL-Type) is with a continuous micro adjustment is to provide accurate position, to reduce the worn-out of soft jaws. TL type (3-Jaws) is designed for the easy production of small sizes of jaws. With only some simple process, soft jaws can be bored. With anticlockwise lock, the machining field can be easily expended.