High performance diamond core drill bits and segments for fast drilling and long life. Highly efficient to drill reinforced concrete and very hard concrete. Premium, Supreme, and Ultra quality grades are available. Other barrel length is upon request. Item No Specification (DiaX Overall)mm DPWCDSB38-50 38X50 DPWCDSB48-50 48X50 DPWCDSB52-50 52X50 DPWCDSB65-50 65X50 DPWCDSB78-50 78X50 DPWCDSB83-50 83X50 DPWCDSB95-50 95X50 DPWCDSB105-50 105X50 DPWCDSB115-50 115X50 DPWCDSB125-50 125X50 DPWCDSB150-50 150X50