The DTH is the abbreviation of Down The Hole and sometimes it is also called RAB in some markets, then the RAB is short for Rotary Air Blasting
Sinodrills DTH bits are made of superior quality alloy steel which is made in U.S. Besides, all our DTH bits are using the premium T.C carbide which provides (the T.C buttons) for famous brand
Sinodrills DTH bits are made of superior quality alloy steel which is made in U.S. Besides, all our DHD DTH bits are using the premium T.C carbide which provides (the T.C buttons) for famous brand