Or the 3550 (with integral snap hook). Nothing else comes close to these blocks for general purpose tower work. -Steve K8LX On 5/27/2014 6:31 PM, Dino Darling wrote: > Hastings 3553... > http://www.hfgp.com/fb-catalog/files/assets/basic-html/page175.html >> What is the best pulley to use with a 11.2 mm climbing rope (200 ft) on >> a 70 tower?