7PCs HSS Straight Groove Step Drill Bit Spiral Screw Metric Composite Tap Twist Drill Bit Set Cutting Drilling Polishing Tools
🛠️ Product Description
| Product number |
RZ0800 |
| Product Name |
7-piece ladder drill |
| Material |
High speed steel 4241 |
| Product weight |
168g/248g |
| Product Color |
yellow |
| Product Size |
144*85.5*33.5mm |
| Product packaging |
Bagged/boxed |
✨
Surface treatment: titanium plating
📦
One set includes: triangular handle ladder drill (single 4-12, single 4-20mm) + triangular handle umbrella drill (8-20mm) + round handle three-edge chamfer (12.4mm) + round handle slot drill saw drill (4/5/6mm).
⚖️
Weight: 168g in bag, 248g in box (plastic box size: 144 * 85.5 * 33.5mm)
❓ Frequently Asked Questions
💡 Q1: What material is the 7-piece drill bit set made of?
A1: This set is constructed from High-Speed Steel (HSS) 4241, which provides robust durability and efficiency for general cutting, drilling, and polishing tasks.
💡 Q2: What are the benefits of the titanium plating surface treatment?
A2: The titanium plating increases the hardness of the surface, reduces friction during drilling, lowers heat generation, and significantly extends the tool's overall working lifespan.
💡 Q3: What different types of drill bits are included in this set?
A3: The set is highly versatile, containing a triangular handle ladder drill (4-12mm / 4-20mm), a triangular handle umbrella drill (8-20mm), a round handle three-edge chamfer (12.4mm), and round handle slot drill saw drills (4/5/6mm).
💡 Q4: Are there options for product packaging?
A4: Yes, the set offers two packaging types: a lightweight bagged version (approx. 168g) and a durable boxed version (approx. 248g) with box dimensions of 144*85.5*33.5mm.
💡 Q5: What type of shanks do these drill bits have?
A5: This composite set features both triangular shanks (optimized for ladder and umbrella drills to prevent slipping in the chuck) and round shanks (for chamfer and saw drill bits).
💡 Q6: Can this set be used on metals?
A6: Yes, the High-Speed Steel 4241 construction with titanium coating makes these bits suitable for drilling, chamfering, and polishing wood, plastics, and thin non-ferrous metals.
Tier Tool
