Type F1 Boring Head: 1.Types F1-12 F1-18 F1-25 2.D(mm) 50 75 100 3.Dia of boring (mm) 10 ... -630 F1 Boring Head: Specification:HT TOOLS is a manufacturer and experienced trading company in the largest machine tool accessories production basis ... ,collet chuck,tool holders, er spanner,er nut,pull stud,machine vise,fasteners etc. we export to many countries in the ...