Catalogo

INTRODUCTION LETTER

Dear Customers:
We are pleased to introduce DIAMANTINA CHRISTENSEN trading company.
Diamantina Christensen is a newly formed company that represents the union of Christensen Chile S.A. and Boyles Bros.
Diamantina S.A., leaders in the supply of geological exploration products. Each of these companies is well known and
respected for their experience and commitment toquality and service.
Diamantina Christensen was founded in order to offer you the convenience of a one-stop shopping store in
combination with our considerable manufacturing and logistic capabilities. Our goal is to serve our customers' needs
with a complete line of diamond drilling tools and accessories.
Both the Chile and Peru plants are ISO 9001:2000 certified, thus assuring you the utmostin quality and consistency.
Along with this introduction letter, please find an overview of our manufacturing facilities and the latest Diamantina
Christensen product catalog. This product catalog will serve to demonstrate to you just how fully equipped we are to
fulfill all of your drilling supply needs.
Best Regards,

Humberto Arce
General Manager

Fernando Buttazzoni
Vice PresidentRev. 2

Valid From 02/18/2008

Copyright © 2006 Diamantina Christensen. All rights reserved. No part of this catalogue may be produced, by any means, without the prior written permission.

INTRODUCTION LETTER

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Christensen Chile S.A.
Founded in 1964, Christensen Chile was formed under the principle of providing quality products and service at a fairprice, thusly maximizing value.
Today, our modern industrial facilities and broad commercial platform gather the most prestigious representations in
the mining industry's percussion, core and water well drilling markets worldwide.
Located in an industrial complex in Santiago, Christensen Chile's facilities cover a surface area of nearly 250,000 square
feet. The industrial plant (of approximately60,000 square feet) uses state-of-the-art technology and equipment to
manufacture drill bits, rods, and spare parts to meet the requirements of today's demanding market.

Constant research and field work experience in diamond core and percussion drilling have permitted Christensen Chile
to constantly improve its vast array of tools. Also, the experience gained through Christensen Chile'sparticipation in
these processes has made it possible to develop the most modern techniques for products required in the drilling and
exploration industries worldwide.

Copyright © 2006 Diamantina Christensen. All rights reserved. No part of this catalogue may be produced, by any means, without the prior written permission.

INTRODUCTION LETTER

Boyles Bros Diamantina S.A.
Boyles Bros.Diamantina S.A. has long been a pioneer in the manufacturer of diamond products in Peru. Our fifty years
of experience have allowed us to accumulate a great amount of knowledge about how to design diamond bits and tools
that best suit given ground conditions.

Located on the outskirts of Lima Peru, in a 50,000 square foot facility, our manufacturing process is carried out using the
latest inhigh tech equipment and procedures. Additionally, our highly qualified personnel frequently visit customer
drilling sites to evaluate usage and performance of our products. This service not only helps our customers to better use
our products, but also helps us to improve our products in order to better serve our customers needs. This combination
of quality product, and quality service, lead tomore successful drilling results for our customers.
Product quality is a priority for us, and our manufacturing technique is based on integrating work from all areas of our
company as well as maintaining ongoing research and development.
High quality products are further assured by the use of the finest in raw materials, and the latest advances in
manufacturing equipment.

Copyright © 2006...