set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal set set ladder drill drill small plated bit handle three titanium piece 3-12/4-12/4-20mm tower Hexagonal