HSS straight shank drill bit set HSS drill set drill set This style of rolling black drill bit set is packed in red plastic box. ... 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10. HSS ... -20mm6.Flatted shank prevents slippage in three jaw chuck 7.point angle:118 degree,135 degree split point8.Advanced ... to contact with me.thanks.HSS straight shank drill bit setHSS drill setdrill set HSS straight shank ...