Duksbak WF-7 Coil Bound Field Book – Field Pattern (4.5" x 7") The Duksbak WF-7 coil bound field book is designed for reliable note-taking in demanding outdoor environments. Featuring a field pattern layout, it supports clear, structured recording for surveying and inspection workflows, even in wet conditions. Key Features • Field pattern pages for structured data recording • Waterproof, tear-resistant sheets for all-weather use • 4.5" x 7" compact format for field portability • Coil binding lays flat for easy writing