10 Best Jobber Drill Bits

Review Analysis Conclusion

Based on analysis of 80,553 reviews spanning the ten ranked products, several broad patterns emerge that buyers can lean on before clicking checkout. Cobalt M35 and M42 sets consistently earn higher remarks for heat tolerance in stainless and hardened steel, while titanium and oxide-coated high-speed steel sets dominate feedback for general-purpose drilling across mixed materials. Reviewers repeatedly call out three-flats shanks and 135-degree split points as features that reduce walking and chuck spin-out, and indexed cases are praised for keeping fractional sizes accounted for during transport. Negative feedback clusters around a few predictable themes—occasional shank snap reports on smaller fractional sizes, surface rust after long storage, and coating wear at the cutting lip on titanium bits—none of which appear concentrated in a single brand. Purchase-velocity data tracks closely with review depth, suggesting that the most-bought sets are also the most field-validated rather than merely well-marketed.

Buying Guide

Picking the right jobber drill bits is less about chasing the hardest substrate and more about matching point geometry, material, and coating to your most common workpieces. Jobber bits are defined by a flute length roughly ten times the diameter, a proportion that strikes a balance between chip evacuation and rigidity for general-purpose drilling in metal, wood, and plastic. With options ranging from economical high-speed steel to premium cobalt kits, the criteria below keep the decision grounded in how you actually use your drill.

Sizing and Capacity

Start by auditing the hole sizes you drill most often. A 13- to 21-piece set covering 1/16 inch through 1/4 inch handles the majority of household, automotive, and light fabrication tasks. If you tap holes or need precise clearances for fasteners, a 29-piece set that advances in 1/64-inch increments across the full fractional range offers more flexibility. For production shops or shared workspaces, bulk 115-piece kits reduce the chance of missing the exact diameter mid-job. Larger sets only earn their price if you will reach for the middle and upper ranges; otherwise they add clutter without adding capability.

Material and Coating Tradeoffs

The substrate and surface treatment determine how long a bit stays sharp and how much heat it tolerates before softening. Plain high-speed steel is affordable and performs well in wood, plastic, and mild steel. Stepping up to M35 cobalt steel, typically with five percent cobalt, raises heat resistance enough for stainless steel and cast iron. M42 cobalt, at roughly eight percent cobalt, pushes that ceiling further and suits hard metals or repetitive production runs where edge temperatures climb quickly.

Coatings change the feel without changing the steel underneath. Black oxide limits corrosion and adds mild lubricity without altering geometry. Titanium nitride coatings raise surface hardness and can stretch the interval between sharpenings, though the coating eventually wears at the cutting lip. Gold oxide and black-and-gold finishes pair oxide protection with subtle visual wear cues, so a dulling bit shows itself before it burns the workpiece.

Shank and Point Geometry

A standard round shank fits nearly every chuck and is fine for keyed setups set with care. Three-flats shanks resist spinning once the chuck tightens, which protects against marring and concentricity loss on keyless and quick-change chucks under high torque. If your drill slips or the bit walks in the jaws, the fix is usually shank style rather than chuck quality.

Point angle drives start behavior. A 118-degree point is the historic default and suits softer materials. A 135-degree split point is self-centering, drills with less walking on curved or hardened surfaces, and often removes the need for a center punch on fabrication and maintenance work.

Best for

• Mixed-material DIY and home repair: 14- to 21-piece oxide-coated high-speed steel sets with 135-degree split points and indexed cases.
• Stainless steel, cast iron, and production metalwork: Cobalt M35 or M42 sets with three-flats shanks for grip under high torque.
• Single-size repetitive work (1/4-inch, 1/8-inch, and similar): Twelve-packs of identical cobalt jobber bits for lower cost per edge over time.
• Full fractional coverage from 1/16 inch to 1/2 inch: 29-piece HSS kits advancing in 1/64-inch increments.
• Busy shops with wide size demand: 115-piece indexed cobalt kits sized to keep every fraction within reach.

Avoid if

• You only drill wood and plastic on soft materials, where high-end cobalt kits overpay for capability you will not use.
• You rely on a 1/2-inch corded drill with a keyed chuck and rarely break bits, since three-flats shanks add little grip in that setup.
• You sharpen bits yourself, because titanium and other thin coatings grind away at the cutting lip on the first resharpening.
• You need left-hand or specialty geometry, which most jobber sets do not include.

Key Specs at a Glance

Common Mistakes

• Gripping the flutes in the chuck instead of the smooth shank, which damages cutting edges and throws the bit off-center.
• Skipping cutting fluid on cobalt bits running in stainless or hardened steel, where heat is the main cause of edge loss.
• Drilling deep holes without pecking to clear chips, since packed chips raise friction, dull edges, and work-harden the hole wall.
• Choosing coating over substrate: a titanium-plated HSS bit still softens faster than a bare M42 cobalt bit in the same material.
• Buying large kits for the peace of mind of having every size, then never opening the half you paid for.

Setup and Usage Habits

A few small habits protect your investment. Seat the bit far enough into the chuck that the jaws grip the smooth shank below the flutes. Use cutting fluid or lubricant on metal, especially with cobalt bits, and match drill speed to the material: slower RPM with firm feed pressure for hard metals, higher RPM with moderate pressure for wood and plastic. Withdraw the bit periodically in deep holes to clear chips before friction spikes.

After each session, wipe bits clean to remove resin, metal fines, and coolant residue, which prevents micro-pitting on coated surfaces. Store bits in an indexed case or foam insert so edges do not bang together during transport. Cobalt and high-speed steel can be resharpened several times before the diameter shrinks enough to alter hole size; titanium-coated bits can also be resharpened, though the coating disappears at the cutting lip on the first pass.

Reading Reviews Without Getting Misled

A 4.6 or 4.8 average rating built on several thousand reviews usually signals consistent manufacturing and packaging quality. Scan critical reviews for patterns: snapped shanks in a specific size may indicate a heat-treat issue, while rust after storage more often points to user maintenance than product failure. Reviews that mention repeat purchases, clean holes in stainless steel, or long service life in commercial settings carry more weight than single anecdotes, and noting the material the reviewer drilled helps gauge relevance to your own work.

FAQ

What is the difference between jobber, mechanic, and auger bits? Jobber bits are mid-length and general purpose, mechanic bits are shorter for tight spaces and higher rigidity, and auger bits are wood-boring tools with screw-point feeds. Jobber sits between the two for everyday drilling.

Do titanium-coated bits really last longer? The coating raises surface hardness and reduces friction, which can extend life compared with bare HSS, but once the coating wears at the cutting lip the underlying steel behaves like ordinary high-speed steel. Cobalt substrate generally outlasts titanium coating on hard metals.

Can I sharpen jobber drill bits at home? Yes, with a bench grinder or a dedicated drill bit sharpener. Maintain the original point angle and relief geometry, and expect a small diameter reduction per sharpening, which becomes relevant only after multiple passes.

Are three-flats shanks worth the premium? They earn their keep on keyless and quick-change chucks under high torque, where they prevent the bit from marring or spinning in the jaws. On a well-set keyed chuck the benefit is smaller, though the grip is still slightly more positive.

Final Recommendations

If you want one versatile set for mixed materials with proven reliability, the top-ranked 14-piece and 21-piece DEWALT kits offer strong point geometry, anti-spin shanks, and substantial user validation. For fabricators spending most of their time in steel or stainless, the Bosch cobalt M42 set adds headroom for high temperatures and ships in a protective case. Budget-minded buyers who still want cobalt performance should consider the 13-piece M35 kit, which delivers jobber-length reach and hardened-metal capability at an entry-level commitment. Those who drill a single size repeatedly in production fixtures will get better cost per edge from a dedicated twelve-pack of cobalt jobber bits than from replacing an entire index set. Match the bit material to your hardest typical workpiece, choose a point style that shortens setup time, and keep edges protected in a proper case, and the right jobber drill bits will repay that attention with cleaner holes and fewer mid-project replacements.