Drilling gauge for door handle (Germany)

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Handy tool for accurately positioning holes in interior doors to secure door handles. German standards govern the dimensions used for mounting door handles. A steel bar, usually 8x8mm square, is inserted through the door to stabilize the drill guide and ensure precise placement. A small drill bit with a 3mm diameter is ideal for drilling. The resulting hole typically measures 7mm in diameter, though this may vary depending on the handle type. Two models are available: one designed for standard handles and another for toilet doors equipped with lever-style handles without keys.