Custom Titanium multi-hole reference standard. Contains 9 hole sizes; 2.0mm, 2.5mm 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm and 6.0mm, 6.5mm. 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, 10.0mm, 10.5mm, 11.0mm, 11.5mm, 12.0mm, 12.5mm, 13.5mm, 14.0mm, 14.5mm,
