Perfect Tools is the leading manufacturer and supplier of “Key Hole Bits – 451” from Ahmedabad, India. Technical Specification Code No.Dia (mm)D1 (mm)B (mm)H (mm)Shank (mm)Price 4519.526.354.769.508538 451-A9.526.354.769.5012538 45212.706.354.769.508538 452-A12.706.354.769.5012538