Arrowhead drill comprises an hollow support and a blade fixed with an hole where support's pin is fitted

摘要

Arrowhead drill comprises an hollow support (101) with a pin (108) and a blade (10) fixed to the support. The blade has an hole (11) slightly larger than the pin where the pin is fitted. Once the pin is fitted in the blade's hole there is still space between the pin and the hole's wall. Independent claims are also included for the blade of the drill and the process to obtain the arrowhead drill.