【Step Drills & Cone Drill】3 piece 5/9/14 step drills (4-12/20/32mm) and 1 piece cone drill (8-20mm). Laser marking of step size provide convenient and accurate drilling 【Countersink Drill Bits】6 piece countersink drill bits: 6.3, 8.3, 10.4, 12.4, 16.5, 20.5mm - 90° point, three cutting edges, ideal for deep countersinking 【High Quality】All drills are HSS Titanium coated, come with 1/4" (6.35mm) hex shank, and are precision ground, heat treatment, and hardened for consistently accurate drilling or enlarging holes into sheet & non-ferrous metals, wood and plastics 【Multi-Drill Saw & Center Punch】Multi drill saw (6mm) can be used in combination with drills, saws, rotary files, reamers and routers. Automatic brass center punch provides high impact spring-loaded strike when pressed against working surface; striking force is adjustable by turning cap 【Ergonomic Storage Box】Insert hex shank into black plastic holder at 10°-15° first, then push head of product down to fix firmly. Box can be re-used to store other tools by taking out foam inlay