Faithfull's 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. Manufactured to meet DIN 338 standard. PLEASE NOTE: These drill bits are priced individually but supplied only in bulk packs. Sizes up to and including 3/8in are supplied in 10's. Larger sizes are supplied in 5's. Ref: UTTK11397