Exhibit 21

CORPORATE DIRECTORY

Our consolidated subsidiaries and affiliated companies as of June 30, 2011 are:

Consolidated Subsidiaries and affiliated companies of Kennametal Inc.
Kennametal Australia Pty. Ltd.
Kennametal Distribution Services Asia Pte. Ltd.
Kennametal (Thailand) Co., Ltd.
Kennametal Japan Ltd.
Kennametal (Malaysia) Sdn. Bhd.
Kennametal de Mexico, S.A. de C.V.
Kennametal Sp. Z.o.o
Kennametal (Singapore) Pte. Ltd.
Kennametal South Africa (Pty.) Ltd.
Kennametal Korea Ltd.
Kennametal Hungary Holdings Inc.
Kennametal Hungary Finance Services Kft.
Kennametal Financing I Corp.
Kennametal Holdings Europe Inc.
Kennametal Extrude Hone Corporation
Hanita Metal Works, Ltd.
Kennametal Tricon Metals & Services, Inc.
Kennametal Shared Services Private Limited
Kennametal Hardpoint (Taiwan) Inc.
ISIS GHH Limited

Consolidated Subsidiary of Kennametal Holdings Europe Inc.
Kennametal Luxembourg Holding S.à.r.l.
Kennametal Verwaltungs GmbH & Co. KG (partnership)

Consolidated Subsidiaries of Kennametal Sp. z.o.o
Kennametal Produkcja Sp. z o.o.

Consolidated Subsidiaries of Kennametal Luxembourg Holding S.à.r.l.
Kennametal Luxembourg S.à.r.l.
Kennametal Europe Holding GmbH
Kennametal Holding (Cayman Islands) Ltd.

Consolidated Subsidiaries of Kennametal Luxembourg S.à.r.l.
Kennametal Ltd. (Canada)
Kennametal Asia (HK) Ltd.
Kennametal Sintec Holding GmbH

Consolidated Subsidiary of Kennametal Ltd
Camco Cutting Tools Ltd.

Consolidated Affiliated Companies of Kennametal Europe Holding GmbH
Kennametal Europe GmbH

Consolidated Subsidiaries of Kennametal Europe GmbH
Kennametal Holding GmbH
Kennametal Nederland B.V.
OOO Kennametal

Consolidated Subsidiaries of Kennametal Holding GmbH (Germany)
Kennametal Hertel Europe Holding GmbH
Kennametal Widia Beteiligungs GmbH

Consolidated and affiliated Subsidiaries of Kennametal Hertel Europe Holding GmbH
Kennametal GmbH
Kennametal Hungaria Kft.
Kennametal Logistics GmbH
Kennametal Shared Services GmbH
Kennametal Sintec Keramik GmbH
Widia GmbH

Consolidated Subsidiaries and Affiliated Companies of Kennametal GmbH
Kennametal Belgium S.p.r.l.
Kennametal Deutschland GmbH
Kennametal France S.A.S
Kennametal Italia S.p.A.
Kennametal Kesici Takimlar Sanayi Ve Ticaret Anonim Sirketi
Kennametal Polska Sp. Z.o.o.
Kennametal Produktions GmbH & Co. KG. (partnership)
Kennametal UK Limited
Kenci S.L.
Kennametal AMSG GmbH
Ruebig Real Estate GmbH & Co. KG

Consolidated Subsidiary of Kennametal Italia S.p.A.
Kennametal Italia Produzione S.R.L.

Consolidated Affiliated Company of Kennametal Produktions GmbH & Co. KG (partnership)
Kennametal Real Estate GmbH & Co. KG (partnership)

Consolidated Affiliated Company of Kennametal Deutschland GmbH
Kennametal (Deutschland) Real Estate GmbH & Co. KG (partnership)

Consolidated Subsidiaries of Kennametal Asia (HK) Ltd.
Kennametal Hardpoint (Shanghai) Co., Ltd.
Kennametal (China) Co. Ltd.
Kennametal (Xuzhou) Company, Ltd.

Consolidated Subsidiaries and Affiliated Companies of Widia GmbH
Kennametal Widia Real Estate GmbH & Co. KG (partnership)
Kennametal Widia Produktions GmbH & Co. KG (partnership)
Meturit AG

Consolidated Subsidiary of Meturit AG
Kennametal India Ltd.

Consolidated Subsidiaries of Kennametal Holding (Cayman Islands) Ltd.
Kennametal Argentina S.A.
Kennametal do Brasil Ltda.
Kennametal Chile Ltda.

Consolidated Subsidiaries of Kenci S.L.
Kenci Lda.
Kennametal Manufacturing Barcelona S.L.
Materiales y Accesorios Kenem S.L.

Consolidated Subsidiaries of Kennametal UK Ltd.
Kennametal Logistics UK Ltd.
Kennametal Manufacturing UK Ltd.
Kennametal Sintec Keramik UK Ltd.

Consolidated Subsidiary of Kennametal France S.A.S.
Kennametal Production France S.A.R.L.

Consolidated Subsidiaries of Kennametal Extrude Hone Corporation
Kennametal Extrude Hone Ltd. (U.K.)
Kennametal Extrude Hone Limited (Ireland)
Extrude Hone Participacoes Ltda.
Extrude Hone Shanghai, Co. Ltd.

Consolidated Subsidiaries and Affiliated Company of Kennametal Extrude Hone Limited (Ireland)
Kennametal Extrude Hone Holding GmbH
Extrude Hone KK (Japan)
Kennametal Extrude Hone GmbH & Co. KG (partnership)

Consolidated Subsidiaries of Kennametal Extrude Hone Holding GmbH
Kennametal Extrude Hone GmbH
Kennametal Extrude Hone Czech s.r.o

Affiliated Company of Extrude Hone Participacoes Ltda.
Extrude Hone do Brasil Sistemas De Acabamentos De Peca Ltda.

Consolidated Subsidiaries of Hanita Metal Works, Ltd.
Hanita Cutting Tools, Inc.

Consolidated Subsidiaries of Kennametal Sintec Holding GmbH
Sintec Keramik Shanghai Co., Ltd.
Kennametal Sintec Keramik Asia Ltd.

Consolidated Subsidiary of Kennametal Sintec Keramik Asia Ltd.
Kennametal Sunshine Powder Technology Co., Ltd.