About our company

150A6217_buildingDeveloped in 2011, Grower Twin-Lock® washers are made in Italy by one of the world’s leading manufacturers of security washers. With 60 years experience, Growermetal continuously invests in technology and human resources to produce high quality products. The complete production process is done in-house from stamping to heat treatment to mechanical zinc plating. Product is then stored in Growermetal’s state of the art, fully automated warehouse. Growermetal’s manufacturing and distributing processes are certified ISO/TS 16949, UNI EN ISO 9001 and UNI EN ISO 14001.

With effect from April 28, 2015, Twin-Lock AB has been setup to manage the sales and business functions of Twin-Lock. The Twin-Lock products will continue to be produced at the Growermetal premises in Italy.

For more information about Twin-Lock AB, please email

Twin-Lock AB 
S:t Johannesgatan 1D
211 46 Malmö, Sweden
Phone: +46 10-146 10 90
Twin-Lock China
邮编 200060
Phone: +86 (21) 5269 0136