Allen Brothers 20mm Single Block with Hook AL-2021-HK

20mm Single Block with Hook The Allen 20mm dynamic ball bearing block delivers premium engineering and design for demanding marine applications. Featuring line-friendly soft contours and smooth articulation, this micro block minimises rope wear whilst maximising performance. Stainless steel cheeks and inner bearing systems withstand maximum loads without compromise. The central hole accommodates a tie-on becket for secure attachment. Built for serious sailors who demand reliability and precision.