FOCSTOL 10-Piece Skewed-Head Eccentric Drill Bit Set Review
A ten-piece eccentric bit set with tungsten carbide tips and a hex shank for tile, masonry, and positioning cuts.
| Pieces | 10 bits |
|---|---|
| Diameters | 5, 6, 8, 10, 12mm |
| Total length | 90mm |
| Working length | 54mm |
| Cutter head length | 9 to 20mm |
| Shank | Quick-change hex, 6.35mm |
| Best for | precise positioning and drilling on tile and masonry |
Product Overview
This FOCSTOL kit gathers ten skewed-head eccentric drill bits, sized 5mm through 12mm across a 90mm total length. Each tip is welded with industrial tungsten carbide on a high-strength steel body, and a quick-change hex shank speeds swaps. The slant-head shape targets precise positioning and fast cutting.
Material guidance splits the work. Dry drilling suits softer stock like wood, PVC, foam and antique tiles, red brick, and cement. Harder materials such as glass tile, porcelain, ceramic, and marble need added water or coolant. Spiral head grooves clear chips throughout.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
The angled tip aims for precise positioning and efficient cutting.
Industrial carbide is welded to each tip for abrasion resistance.
Diameters run 5mm to 12mm for a range of hole needs.
The 6.35mm hex shank speeds tool-free bit swaps.
Bits drill holes or help guide other drills into place.
Design and Build Quality
The set lists ten bits with diameters of 5, 5, 6, 6, 6, 6, 8, 8, 10, and 12mm. Total length runs 90mm with a 54mm working length, and cutter-head lengths span 9 to 20mm. The handle diameter measures 6.35mm with a quick-change hex shank.
The defining feature is the slant, or eccentric, head. The maker says this geometry ensures precise positioning, fast and efficient drilling, and reduced wear for a longer service life. Spiral grooves in the head handle chip removal.
Tungsten carbide leads the cut. Industrial-grade carbide is welded to each tip for abrasion resistance, while the selected high-strength steel body supports drilling and assists accurate positioning during the cut.
Performance in Everyday Use
The eccentric head has a dual role. On its own it drills a clean hole, and it can also assist other drills by marking and steadying an accurate position first. That makes it handy for layout work on slick tile.
Material matters for method. The maker separates jobs into dry drilling for softer stock and wet drilling for hard tile, glass, and stone. Following that split protects the carbide tip and improves the cut on dense surfaces.
Setup follows familiar rules. A corded, cordless, or benchtop drill at no less than 2000 RPM is recommended, with faster RPM said to lengthen bit life. An angle grinder needs its own chuck. Wear and lifespan claims are maker-stated, not lab-tested here.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Slant eccentric head | The angled tip aims for prec | Maker stated | 8.2 | The angled tip aims for |
| Tungsten carbide tips | Industrial carbide is welded | Maker stated | 8.2 | Industrial carbide is we |
| Ten graduated sizes | Diameters run 5mm to 12mm fo | Maker stated | 8.2 | Diameters run 5mm to 12m |
| Quick-change hex shank | The 6.35mm hex shank speeds | Maker stated | 8.2 | The 6.35mm hex shank spe |
| Dual positioning role | Bits drill holes or help gui | Maker stated | 8.2 | Bits drill holes or help |
Who Should Buy It
- Porcelain and glazed tile
- Red brick and cement
- Wood and PVC pipe
- Marble and glass with coolant
- Accurate hole positioning
- drilling through embedded reinforcing steel
- Wear and life claims are maker-stated
- Hard tile needs water or coolant
- Must avoid embedded reinforcing steel
- Angle grinder needs a separate chuck
Full Specifications
How It Compares
| Feature | Generic | Typical budget | Premium option |
|---|---|---|---|
| Pieces | 10 bits | Basic | Better |
| Diameters | 5, 6, 8, 10, 12mm | Basic | Better |
| Total length | 90mm | Basic | Better |
| Working length | 54mm | Basic | Better |
Alternatives Worth a Look
For anyone drilling tile, brick, or mixed materials, this FOCSTOL eccentric set offers a smart twist on the standard bit. The slant head is built to plant precisely and can even guide other drills into an accurate spot, which helps on slippery glazed surfaces. Ten sizes from 5mm to 12mm cover a useful range, and the carbide tips target hard stock. Match your method to the material: dry for softer wood, brick, and cement, wet for glass, porcelain, and marble. Stick to the recommended 2000 RPM minimum, and add a chuck for an angle grinder. Wear and longevity are maker claims rather than tested figures. Used as intended, it is a versatile positioning and drilling kit.
Frequently Asked Questions
What is a skewed-head eccentric drill bit for?
The slant, or eccentric, head is designed for precise positioning and fast, efficient drilling. Beyond cutting its own hole, the maker says it can assist other drills by steadying and marking an accurate spot. That makes it useful on slick tile where standard bits tend to wander at the start.
What sizes are included in this set?
The kit holds ten bits with diameters of 5, 5, 6, 6, 6, 6, 8, 8, 10, and 12mm. Each has a 90mm total length, a 54mm working length, and cutter-head lengths from 9mm to 20mm. All share a 6.35mm quick-change hex shank for fast swaps.
When should I drill dry versus wet with these bits?
The maker splits it by material. Dry drilling suits softer stock like wood, PVC pipe, foam and antique tiles, red brick, and cement. Harder materials such as glass tile, porcelain, ceramic, marble, and glass need added water or coolant. Following that split protects the carbide tip on dense surfaces.
What drill and speed does the maker recommend?
A corded, cordless, or benchtop drill is recommended at no less than 2000 RPM, and the listing notes faster RPM lengthens the bit's working life. If you use an angle grinder instead, you must install an angle grinder drill chuck first. Avoid drilling into embedded reinforcing steel in concrete.
What material are these drill bits made from?
The tip of each drill is welded with high-grade industrial tungsten carbide, which the maker credits with good abrasion resistance for penetrating various materials. The bit body uses a selected high-strength steel matrix that supports drilling and helps with accurate positioning. These are stated features from the seller, not lab-measured results.
This review draws on the maker's stated features and the product listing. The sizes, tungsten carbide tips, slant-head design, dimensions, and RPM guidance are reported as described by the seller and were not independently lab-tested here. Any rating is an editorial score reflecting how the kit reads for its intended tile and masonry drilling use.