Cobalt Drill Bit Set 4mm 10pc HSS 5% Co Twist Drills for Metal

A 10-piece drill bit set with matching 4mm twist drill bits, made from HSS with 5% cobalt content. Useful when one size gets used regularly, this cobalt drill set gives you spares ready to hand for repeated drilling, so you are not relying on a single bit.

Used for general drilling jobs in the workshop, garage and around the home, it suits both trade users and DIY buyers who often reach for a 4mm cobalt drill bit. Handy for fitting work, maintenance, repair tasks and repeated drilling where stopping to replace a worn bit can slow the job down, it also makes sense as a backup set to keep in the tool box.

Each bit in the set is the same 4mm size, so it is straightforward to keep working when one needs changing out. The HSS construction keeps the set suited to general drilling work, while the 5% cobalt content helps with durability in use compared with a basic bit. With 10 matching pieces included, it is a practical option for regular jobs where one common size gets used again and again, and it helps avoid delays when spare bits are needed. Easy to keep stored together in a drill box, van or workshop drawer, the set is also useful for separating fresh bits from worn ones during ongoing jobs.

Drill bit set specifications

• Contents: 10-piece twist drill bit set.
• Bit size: Each drill bit is 4mm.
• Material: Made from HSS.
• Composition: 5% cobalt content for tougher repeated use.
• Use: Handy for repeated drilling jobs where one size is used often.
• Matching spares: The HSS cobalt drill bits are all 4mm for repeated same-size drilling jobs.

This cobalt HSS drill bit set is a practical choice for regular drilling and maintenance work.