Sizes: 6.5 x 45mm long, 8 x 45mm long, 8 x 79mm long and 10 x 45mm.High speed steel Cobalt twist drills with titanium nitride coating.Supplied in metal case with foam for safe storage.Spare parts available, please see Laser Part No. 60361 (6.5mm), 60362 (8 x 45mm), 60363 (10mm) and 60364 (8 x 79mm).Spare parts available, please see Laser Part No. 60361 (6.5mm), 60362 (8 x 45mm), 60363 (10mm) and 60364 (8 x 79mm).