Tree Climber's Knot Book by Dirk Lingens Brand_Climbing Technology Tree gaffs are longer (2-3/4")

Tree gaffs are longer (2-3/4") and offset for maximum penetration into tree bark

while the 25" version fits the HS-137-22 and HS-137-24

Bartlett Brass — strong

Dull gaffs require more force to penetrate bark and increase fatigue and fall risk

Galvanized steel — corrosion-resistant for long-term outdoor use

Tree Climber's Knot Book by Dirk Lingens Brand_Climbing Technology Tree gaffs are longer (2-3/4")The Essential Knot Reference for Professional Arborists Written by well known German arborist and self confessed knot junkie Dirk Lingens, the Tree Climber's Knot Book is a must have reference for any arborist who wants to expand their knot knowledge. It features knots specifically selected for arborist applications including modern hitches like the Klemheist, the Distel, and the Machard with clear illustrations and practical evaluations comparing