Drill bits STHOR 22616 set, 3 pieces

STHOR 22616 drill bit set contains three HSS gradual (step) drill bits designed for common drilling tasks in workshops and homes. The set is intended for use with handheld drills and drill drivers and provides multiple sizes for replacement or varied use. Each bit is manufactured for drilling through stainless and structural steel, non-ferrous metals, sheet steel and plastics while maintaining clean hole edges and minimizing burrs. The compact packaging makes storage and transport convenient for DIY, maintenance and light professional work.

Advantages

The STHOR 22616 set includes three step drills made of high-speed steel with a nitride titanium coating that improves surface hardness and wear resistance. The stepped geometry enables automatic centering on rounded or slippery surfaces and reduces walking during initial contact. The design promotes faster heat dissipation when working with harder materials, and the cylindrical shank fits standard drill chucks for secure clamping. Hole edges are left clean and burr-free when used with appropriate feed and speed.

Suitable for

• Drilling holes in stainless steel and structural steel
• Working with non-ferrous and colored metals
• Drilling sheet metal and plastic panels
• General DIY, maintenance and assembly tasks requiring stepped drill sizes

Key specifications

• Set composition: 3 step drill bits
• Material: high-speed steel (HSS) with titanium nitride coating
• Shank type: cylindrical shank suitable for standard chucks
• Application materials: stainless steel, structural/cold-rolled steel, non-ferrous metals, steel sheets, plastics
• Step increments: graded steps (incremental diameters at 2–3 mm intervals)
• Typical use: handheld drills and drill drivers

How to use

Select the step drill bit that covers the range of hole diameters you require and mount it securely in the drill chuck. Start drilling at low speed to allow the bit to self-center and prevent walking; apply steady, moderate pressure. Increase speed as needed while monitoring heat buildup. For harder materials, use intermittent drilling or cooling lubricant to prolong tool life. After drilling, remove burrs if necessary and inspect the hole for required dimensions.

Usage recommendations

Use cutting fluid or light oil when drilling stainless or hardened steels to reduce heat and wear; clamp workpieces securely and use appropriate protective equipment. Match drill speed and feed to the material to achieve clean holes and extend bit life.