TACKLIFE PDH06A Classic Titanium Step Drill Bit Set & Automatic Center

Tacklife PDH06A Classic Titanium Step Drill Bit Set & Automatic Center Punch,High Speed Steel |5-Piece Set| Total 50 Sizes,Double Cutting Blades Design with Aluminum Case50 SIZE IN 5 The bits set includes five standard step drill bits that can replace 50 individual drill bits, you can process 50 different kinds of diameter holes with the five pieces? HSS & TITANIUM COATING High speed steel makes it last longer than others, titanium coating ensures easily cut through steel sheets,aluminum sheets,copper & plastic & wood board and many other types of sheet metal with ease, and it can automatically deburr holes while drilling to keep the drill bit clean?AUTOMATIC CENTER PUNCH & PROTECTIVE ALUMINUM CASE the center punch delivers an automatic, highimpact, springloaded strike through adjusting the cap its brass body has a deeply knurled surface for nonslip control and the carbide tipped bit makes the center punch 10 times stronger than normal oneprotective aluminum case makes the drills not easy to dull?DOUBLE CUTTING BLADES & THREESIDED SHANK Double cutting blades and Xtype openings design ensures a faster and smoother cutting and 3sided shank design prevents slip in drill chuck Provided with small pressure and the sets can cut through the wood, sheet metal, steel and other surfaces