Tape measure end hook for eliminating error in plane surfaces measuring

A tape rule provided with an end hook for eliminating error in plane surfaces measuring comprising:

• A) a tape rule with an upper surface and a lower surface having a free end, a bended piece at a right angle having a base side fastened to the said upper surface of the said tape rule and a vertical portion, the said bended piece being entirely positioned on the said upper surface of the said tape rule;
• B) a sliding piece having a bottom part, the said sliding piece being attached to the said vertical portion of the said bended piece in such a way that the said sliding piece can slide along a vertical axis of the said vertical portion of the said bended piece, the said bottom part and the said upper surface of the said tape rule being at the same level at the extreme upper course of the said sliding piece;
• and
• C) the end hook for eliminating for eliminating error also for eliminating snagging on a work piece fastened by rivets to the said free end of the said tape rule having a system to eliminate error for both interior and exterior measurements and apertures for rivets which have strained ends, the said apertures for rivets shaped that the said strained ends of the rivets not exceed the said lower surface of the said tape rule.