CIR90-90mm Low Air Pressure DTH Hammer Bit Advantages 1.Improved steel grade for better fatigue properties 2.Five basic front designs 3.Designs for all rock types #prodrill#drillingtools#rocktools#rockdrillingtools#hammerbit#tophammer#cir#dthbit#bit https://www.instagram.com/p/CCp_A8dDk39/?igshid=1jpgy8mmib7aq















