The gimlet bit is a very old design. The bit is the same design as that Utilized in the gimlet, a self-contained Software for tedious compact holes in Wooden by hand. Since about 1850, gimlets have experienced many different cutter patterns, but some are still created with the original version. https://drill-bit-supplier37158.mybjjblog.com/drill-bit-manufacturer-can-be-fun-for-anyone-46957222