.Include:1mm x 32pcs,  (1.5, 2, 2.5mm) x 30pcs, (3, 3.5mm) x 20pcs, (4, 4.5, 5mm) x 12pcs, 5.5mm x 8pcs, (6, 6.5, 7mm) x 5pcs, (7.5, 8, 8.5mm) x 2pcs, (9, 9.5, 10mm) x 1pc HSS-4241, 1PC-step drill,HSS 4241 with titanium,coated:4-22mm

.Classic HSS construction with titanium coating gives our bit a very high surface hardness and corrosion resistance;

.The N-shaped speed helix split point starts fast and reduces drill walking;

.With a large size range our bits are guaranteed to meet all of your sizing needs for all DIY projects, household maintenance, and general building use.