Model Number: GM-KRF019 Brand Name: GOLDMOON Key Specifications/Special Features: DIN338 HSS drill bit setMaterial: HSS4241/4341/6542/9341/M35Surface finish: rainbowPacking:rose box/metal box/plastic boxSize: 5pcs set/6pcs set/8pcs set/13pcs/set/19pcs set/21pcs set/25pcs/set29pcs set MaterialComponent (%) 4241 C(0.9~1.0);Si(1.0~1.3);Mn(0.25~0.4);P(0~0.035);S(0~0.009);
Cr(3.8~4.2);Mo(0.55~0.85);W(1.6~2.0);V(0.4~0.65);Co(0) 4341 C(0.83~0.93);Si(0.2~0.4);Mn(0.2~0.4);P(0~0.03);S(0~0.009);
Cr(3.8~4.4);Mo(2.5~3.5);W(3.5~4.5);V(1.2~1.8);Co(0) 6542 C(0.8~0.9);Si(0.2~0.45);Mn(0.15~0.4);P(0~0.03);S(0~0.009);
Cr(3.8~4.4);Mo(4.6~4.9);W(5.6~5.9);V(1.8~2.0);Co(0) 9341 C(0.77~0.87);Si(0.2~0.4);Mn(0.2~0.4);P(0~0.03);S(0~0.009);
Cr(3.8~4.4);Mo(2.7~3.3);W(8.5~9.5);V(1.3~1.7);Co(0) M35 C(0.8~0.9);Si(0.2~0.45);Mn(0.15~0.4);P(0~0.03);S(0~0.009);
Cr(3.8~4.4);Mo(4.6~4.9);W(5.6~5.9);V(1.8~2.0);Co(4.6~4.9)