![Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport. Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.](https://c8.alamy.com/comp/2E0BB4G/metz-roller-girls-red-playing-a-match-against-strasbourg-roller-derby-girls-blue-during-a-national-tournament-in-nantes-western-france-on-march-17-2012-roller-derby-is-an-american-invented-contact-sport-the-game-involves-two-teams-of-players-who-are-racing-around-an-oval-racetrack-in-each-team-there-is-a-scoring-player-designated-as-the-jammer-among-the-other-members-called-blockers-the-real-race-is-occuring-between-the-two-jammers-while-the-blockers-are-trying-to-bring-them-down-photo-by-laetitia-notarianniabacapresscom-2E0BB4G.jpg)
Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.
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Metalworking Tools Metal Rollers Forming Fabrication - Metz Tools | Metal working tools, Metal working, Roller
![Paris Roller Girls (red) playing a match against Metz Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport. Paris Roller Girls (red) playing a match against Metz Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.](https://c8.alamy.com/comp/2E0BB65/paris-roller-girls-red-playing-a-match-against-metz-roller-derby-girls-blue-during-a-national-tournament-in-nantes-western-france-on-march-17-2012-roller-derby-is-an-american-invented-contact-sport-the-game-involves-two-teams-of-players-who-are-racing-around-an-oval-racetrack-in-each-team-there-is-a-scoring-player-designated-as-the-jammer-among-the-other-members-called-blockers-the-real-race-is-occuring-between-the-two-jammers-while-the-blockers-are-trying-to-bring-them-down-photo-by-laetitia-notarianniabacapresscom-2E0BB65.jpg)
Paris Roller Girls (red) playing a match against Metz Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.
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![Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport. Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.](https://c8.alamy.com/comp/2E0BB5E/metz-roller-girls-red-playing-a-match-against-strasbourg-roller-derby-girls-blue-during-a-national-tournament-in-nantes-western-france-on-march-17-2012-roller-derby-is-an-american-invented-contact-sport-the-game-involves-two-teams-of-players-who-are-racing-around-an-oval-racetrack-in-each-team-there-is-a-scoring-player-designated-as-the-jammer-among-the-other-members-called-blockers-the-real-race-is-occuring-between-the-two-jammers-while-the-blockers-are-trying-to-bring-them-down-photo-by-laetitia-notarianniabacapresscom-2E0BB5E.jpg)
Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.
![Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national](https://l450v.alamy.com/450v/2e0bb4p/metz-roller-girls-red-playing-a-match-against-strasbourg-roller-derby-girls-blue-during-a-national-tournament-in-nantes-western-france-on-march-17-2012-roller-derby-is-an-american-invented-contact-sport-the-game-involves-two-teams-of-players-who-are-racing-around-an-oval-racetrack-in-each-team-there-is-a-scoring-player-designated-as-the-jammer-among-the-other-members-called-blockers-the-real-race-is-occuring-between-the-two-jammers-while-the-blockers-are-trying-to-bring-them-down-photo-by-laetitia-notarianniabacapresscom-2e0bb4p.jpg)