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. Author manuscript; available in PMC: 2019 Apr 4.
Published in final edited form as: Methods Protoc. 2019 Feb 15;2(1):19. doi: 10.3390/mps2010019

Figure 1.

Figure 1.

Drilling Tool; (a) 1.5 cm shaft removal from the 22G 1” needle using wire cutters and helping hands. (b) Sharpening of the drilling tool by rotating its flat edge across a nail file in a 45° angle. (c) Residue removal from the drilling tool bevel using a #11 scalpel blade.