You Can Use These To Drill Holes In Any Materials. Work With Plastic, Wood, And Most Metals Such As Steel, Brass, Aluminum, And Copper. The Shafts Are So Small That They Should Fit Into A Standard Size Chuck. The Drills Consist Of Forged, Heat-treated, And Polished, Classic High-speed Steel With Titanium Coating For Proven Performance And Durability.
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✨CLEAN & BURR FREE HOLES: You’ve probably used step drill bits before, and if not, you should consider giving them a try. Step drill bits are incredibly useful for drilling clean holes in sheet metal, thin plastic, and other such materials. The way step drill bits shear the edges of a hole as they cut, they leave clean and nearly burr-free holes. 
✨HSS STEEL CONSTRUCTION: High-speed steel construction for longer cutting edge life, even at extreme temperatures.
✨TITANIUM COATING: This titanium-coated step drill bit provides good resistance to heat, corrosion, and rust.
✨AUTOMATIC CENTER PUNCH: Provides an automatic, impact-resistant, spring-loaded impact when pressed against the surface. The adjustable cap regulates the impact force.
✨28 SIZE FOR SINGLE DRILLS: This kit contains three standard step drills that replace 28 single drills.
✨A MUST FOR HANDYMAN OR PROFESSIONALS: Perfect for home repairs and light work such as drilling holes in plastic, aluminum, copper, sheet iron, and many other types of sheet metal (except steel or other harder metals).
✨EASY TO USE: These bits can drill sheet metals like a hot knife on butter. The holes are smooth and round. Their design makes them extremely easy to use. 
Sizes:
4-12mm Length: Approx. 6.7cm/ 2.64"
4-20mm Length: Approx. 7.4cm/ 2.91"
4-32mm Length: Approx. 10.2cm/ 4.02"
The 3 Cutters Come in the Following Sizes:
4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 2mm)
4-20mm : 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 14mm, 16mm, 18mm, 20mm
4-12mm (4mm, 6mm, 8mm, 10mm, 2mm)
Please note: the difference between the Medium and the Large set is:
in the large set, there is an extra-large bit of 4-32 bit instead of the 3-12 bit
Specification:
Material: Titanium
Packge includes : 1 set of 3 pcs 
Please allow 10-24 business days for the item to arrive. Please note: due to the ongoing global COVID-19 pandemic, some minor delays in product delivery are possible, we are doing our absolute best to make sure you get your products as soon as possible.
