COMBINED DRILLS AND COUNTERSINKS (CENTER DRILL BITS) Product Description Combined drills and countersinks (center drill bits) Available in HSS,HSSCO. Product Feature (Din 333 Form A,B,R).Plain type,bell type and radius type. Ground, bright finish Product Specification/Models Size:1-10mm;3/64"-25/64" Application These are designed with 118 degree point angle and a 60 degree countersink included angle with spiral flutes. They are used for center holes in work pieces for additional manufacturing operations. Other Information Tin--coating on request Solid carbide k10 micro-fine on request Tin--coating on request