Environment burden of four substances used in the key-making process

The materials that we use in the production of our "key blanks" do not pose environmental problems:
"Pb (lead)"…falls under exempted category, "Copper Alloy containing less than 4% Lead."
"Cd," "Hg," "Cr6+"…Only present in minor amounts

Materials (Raw Materials)
  Free Cutting Brass

Lead (Pb) Content…1% - 2%
We believe these materials are the most appropriate from the standpoint of usage in duplicate keys.
Featuring superior "cutability" and "machinability," preventing "burrs."
In general, Goto Manufacturing plates our products to prevent rust and corrosion, and to enhance durability.

  Free Cutting Nickel Silver

Lead (Pb) Content…0.5% - 1.5%
Material is not susceptible to color changing on the cut face, and maintains a premium finish.
Material color differs according to the amount of nickel content.


Lead (Pb) Content…less than 0.01%
Most "pure keys" used for Japan ' s houses and automobiles are made of this material.

  BERIC Alloy for Diecast Usage

BIT, TUBU and a certain number of other products we manufacture use BERIC.
Superior when compared with regular zinc diecast products in terms of wear resistance, tensile strength, and hardness. This material is also superior in mechanical properties.


We believe that iron presents a number of problems as a raw material for key manufacturing. These drawbacks include magnetism, susceptibility to corrosion, susceptibility to cutting, etc. At present, Goto Manufacturing does not use iron as a raw material in our keys.


The type of aluminum alloy best suited for key manufacturing presents a number of problems in our view. These problems include susceptibility to corrosion, susceptibility to color changes, and inferior durability. At present, Goto Manufacturing does not use aluminum as a raw material in our keys.

  Nickel Plating

The appearance of key plating differs widely from lot to lot.
At Goto Manufacturing, we have been able to achieve a consistently stable luster that is both subtle and highly adhesive.
We do not use copper underplating in our nickel plating.

  Nickel-Free Plating

Plating conducted as an anti-allergy measure.
Compared with "nickel plating," this has a somewhat inferior luster.

Chrome Plating

Goto Manufacturing does not use chrome plating due to problems involving hardness and thickness.