GSM210MH 8-1/4″ (210mm) Samurai Challege Straight Pruning Saw w/ Scabbard . The Challege is widely used in fine pruning of small hardwood branches in tight structures. Some professionals even prefer this saw over their hand pruners for making precision cuts in tight spots. Specifications: Manufacture: Samurai Length: 8-1/4″ Teeth per inch: 8.50 Hardening: Impulse Replacement Blade Model #: GSM211MH