Kokuyo one Patch Stamp 2 Hole Type Data -PSM20B by Kokuyo Co., Ltd.

[Two Holes Type] Reinforce two holes simultaneously with the hassle-free hole-punch reinforcement feature. The colored alignment guide allows for efficient positioning and sticker application of 5 to 10 sheets at once. [Easy to Use] Simply slide the base plate underneath the paper, line up the guide bump with the hole, and gently press down on the top of the stamp. And then it adds perfectly aligned reinforcement stickers to the holes of your binder paper. [Firm Reforcement] Uses the original "dot type glue" so each sticker comes off cleanly and sticks firmly to the paper. [Transparent Patch] The transparent type of stickers will not hide the letters underneath the reinforced stickers. [Patch Size] The stamps have an inner diameter of (0.2 inches) 6 mm and an outer diameter of 0.6 inches (14.5 mm).