Glock Armorers Manual, Safe-Action Pistols (Unbound loose leaf facsimile) .Book on 24# (HEAVY) paper. UNBOUND BINDER-READY / LOOSE LEAF, BINDER-READY means that the pages are hole-punched and ready to be put in binders. PLEASE NOTE THE BINDER(S) ARE NOT INCLUDED. LOOSE LEAF UNBOUND EDITION NO BINDER. OKYDdn