Our chisels are manufactured using materials specially ordered by researching with steel makers to withstand impact friction and bending. We also strive to use the most suitable material based on the data obtained from many years of experience and daily achievements. Our chisels are shipped after being processed with such carefully selected materials, carefully heat treated and rigorously tested for hardness.

We are confident of the sufficient durability of the O.T. brand chisels but chisels are used in various harsh locations and conditions, and it cannot be said that they never break, depending on the skill levels of the users or the method of us.

Since hydraulic breakers are generally used by attaching them to a power shovel, the bucket cylinder, arm cylinder, boom cylinder, etc. are operated during work to chisel the object.

If an excessive force is applied in a direction different from the hitting direction of the chisel in such a case, it may cause the chisel to break or bend.

The chisel can withstand vertical impacts well, but improper work such as bending, prying, and striking can easily cause breakage and chipping.

In order to prevent problems caused by parts that exceed the wear limit or insufficient lubrication, perform a pre-work inspection and use in an appropriate condition.
Always operate so that the force that pushes the breaker in the striking direction is applied.
◎ By keeping in mind the correct usage, it is possible to extend the life of the chisel as much as possible.
The chisel can withstand vertical impacts well, but improper work such as bending, prying, and striking can easily cause breakage and chipping.