Made exclusively for Davey & Co. Traditional laminated Tufnol blocks are economically priced and very robust. They have a stainless steel frame to AISI304 with brass bush bearings. All breaking loads have been certified by Germainscher Lloyd in Hamburg. The figures are daN which approximates to 1 Kg 14mm line, sheave diameter 50mm, breaking load 2010, SWL 1005.