Samson have developed high performance cordage for over 125 years and they maintain one of the largest and well respected Research and Development departments in the industry. The Samson Splicing Manual is the end result of all the research conducted over the last 125 years. This is the most definitive splicing manual available on the market. Every climber knows that a knot can reduce the strength of the rope by up to 60%. In contrast, splicing can maintain as much as 90% of new rope strength… and it is much tidier. That's one reason why splicing has become so popular. A must-have for every tree climbers library even if you don't intend splicing your own rope - the background information regarding rope construction is invaluable. Durable cover and spiral bound for 'lay-flat' reading.