The gimlet bit is an extremely previous design. The little bit is identical design as that Employed in the gimlet, a self-contained Resource for monotonous compact holes in wood by hand. Given that about 1850, gimlets have had various cutter layouts, but some are still generated with the first version. https://drillbitsupplier37148.estate-blog.com/33446482/an-unbiased-view-of-drill-bit