Tenghebao Self Centering Woodworking Adjustable Replacement Review

Superior drilling performance:Center drill is made of high speed steel drill bit & quenching treatment shell designed. Superior drilling performance, high hardness and durability, reducing your working time by more than half. Satisfy all you demand: hinge drills come in 8 different sizes: 5/64', 7/64'', 9/64''*2, 11/64'', 13/64'', 5mm and 1/4". With 1 Hex key , 8 replacement drill bits. High-quality materials: Center Drill use of high-quality HSS high-speed steel. The service life is four to five times that of a common center drill. Excellent design: Automatic positioning center enhance accuracy and efficiency. Double-sided hole design - fast & automatic discharge Sawdust from the hole on both sides. Multipurpose: Center Drill bit perfect for hinges, handles, drawer slides, woodworking .