Archival material created and made in USA. Lineco is a leading and trusted brand for archival quality art and framing supplies METAL-FREE: Brush is metal-free, comfortable to use STURDY BRISTLES: Brush uses natural bristles that are tightly packed to distribute glue evenly COMFORTABLE: Handle is designed for comfortable and easy use EASY TO USE: This brush can apply binding glue evenly and smoothly. Just wash the glue on the brush with some warm water, and it can be thoroughly cleaned and quickly dried Designed for bookbinding and adhesive applications, the dense natural bristles load and carry lots of glue and spread glue evenly over large surfaces. Metal free construction is comfortable to use.