Sheet protectors feature a top-loading design that eliminates the need for hole punching. Heavyweight protectors are seven-hole punched for storing in three-ring or four-ring binders. Archival-quality polypropylene means print won't stick to sheet protectors. Strong, reinforced binding edge prevents tears, even with heavy use.Sheet protectors feature a top-loading design that eliminates the need for hole punching. Heavyweight protectors are seven-hole punched for storing in three-ring or four-ring binders. Archival-quality polypropylene means print won't stick to sheet protectors. Strong, reinforced binding edge prevents tears, even with heavy use.