Twist drill bit M43 straight shank diameter 4.5mm

▸ Model specification: M43 twist drill bit diameter 4.5mm
▸ Material composition: 5% cobalt-containing high-speed steel (HSS-E)
▸ Applicable material: stainless steel/cast iron/high hardness metal
▸ Shank structure: straight shank design
▸ Technical standard: DIN338 R-type grinding process