Sealey motorcycle lock chains sealey cl129dl this motorcycle chain and disc lock from sealey is a heavy duty 12mm square link chain fitted with durable nylon sleeve for avoiding accidental scratching and damage to the bike features extra long 12mm thick shrouded shackle with anti drill anti saw and anti pick protection on the locking cylinder sealey cl129dl motorcycle chain amp disc lock 12 x 12 x 900mm