Faithfulls imperial hss jobber drills are suitable for home users and diy enthusiasts high speed steel hss straight shank drills that are suitable for use on both wood and metal and may be used in hand or power drills a cutting lubricant is recommended when using these drills in metal please note these drill bits are priced individually but supplied only in bulk packs sizes up to and including 38in are supplied in 10s larger sizes are supplied in 5s