... :100% Stainless Steel Tough;Long-lasting,Durable,Strong100% Spin Tested;for field point accuracyANIX locking system;a precies,foolproof blade locking ... all steel design,scary-sharp LUTZ blades,100% spin tested accuracy,and our exclusive ANIX blade locking system,this head prevails ... negative feedback from seller.Customer Service:If you're looking for more help or have a question to ask,please ...