Hss 5PCS Titanium Spiral Grooved Step Drill Bit Set with Automatic Center Punch, Unibit Drill Bits Set for Sheet Metal
ALL-IN-ONE step drill set with 6 HSS titanium drills and 1 center punch used for drilling steel sheets，aluminum sheets，copper & plastic & wood board and many other types of sheet metal. The ultra-sturdy HSS material with titanium coating surface ensures its unmatched durability and hardness. Your dream drill set!
50 SIZES IN 5 & SPIRAL GROOVED DRILL. You can process holes of 50 different sizes with only 5 pieces; and the spiral grooved design improves sharpness and accuracy for smoother cutting.
HIGH SPEED STEEL & TITANIUM COATING High speed steel guarantees ultra-hardness and durability; and the titanium coating ensures easy cut through steel sheets，aluminum sheets，copper & plastic & wood board and many other types of sheet metal easily, and the edges prevent metal filings flying around.
AUTOMATIC CENTER PUNCH The center punch delivers an automatic, high-impact, spring-loaded strike through adjusting the cap; its solid brass body has a deeply engraved surface for non-skid control to locate more accurately.
PROTECTIVE ALUMINUM CASE makes the drills not easy to dull and protect them from abrasion, oxidation, and corrosion and avoids breakage.
MULTIPLE UESES for sheet metal, sink, car repair, etc., most suitable for aluminum sheets less than 5mm in thickness.
#1:1/4~3/8’’ (7mm~35mm), 10 Step
#2: 3/16~7/8’’ (5mm~23mm), 12 Step
#3: 1/8~1/2’’ (4mm~13mm), 13 Step
#4: 1/4~3/4’’ (7mm~20mm), 9 Step
#5: 3/16~1/2’’ (5mm~13mm) 6 Step
1 set Titanium Spiral Grooved Step Drill Bit Set
1 aluminum case