135° Top Angle Design Adopt 135° top angle design, sharp and labor-saving, to ensure the positioning of high-speed steel in the drilling hole.
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8.3 & HSS 8.3 means that the diameter of the twist drill bit is 8.3mm, hss means that the material is hss stainless steel.
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ST5/16-18 & HSS ST5/16-18 means that the type of the cutting tap is 5/16-18, hss means that the material is hss stainless steel.
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High Quality Thread The cutting tap is made of hss stainless steel, protect and maintain good threading from wear and tear.
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