Stubby vs Jobber Drill Bits: Choosing the Right Length

Quick answer

Choose stubby bits when the hole is shallow, the drill is close to the work, or the bit keeps snapping; choose jobber bits when you need reach, chip clearance, or a single bit set that covers common depths. Stub drill length trades reach for rigidity, so it wins in tight spaces and on hard, grabby metal. Jobber bits remain the default for general drilling because their longer flute clears chips and reaches past obstructions.

How length changes the way a bit cuts

Jobber bits are the workshop default: long enough to drill through most brackets, plates, and lumber, with enough flute to pull chips out of the hole. That extra length is also a lever. Any sideways pressure from a hand drill bends the bit, and a bent bit drills an oversized, out-of-round hole before it snaps. Stubby bits shorten that lever, so they stay straight under the same hand pressure and are far less likely to break.

Chip clearance is the trade-off. A short flute packs chips into a shallow hole, so you peck at the work instead of drilling continuously. In thin sheet metal or a shallow bracket, that is a non-issue. In deep steel, a jobber bit clears chips while it cuts, which keeps heat and friction down.

Match the bit to the hole, not to the drill

Measure the depth you actually need before you choose. If the material is thinner than the flute length of a stubby bit, a jobber bit adds nothing but breakage risk. If the hole must pass through a thick casting or a stack of plates, a stubby bit will bottom out and the shank will rub, which burns the cutting edges.

For machine screw drill bits, the name refers to the short, stiff format used for machine screws and shallow fastening work, not to a specific size. That stiffness is the point: it keeps the hole on center when you are drilling a pilot for a screw in a tight assembly.

When short drill bits win in tight spaces

Short drill bits tight spaces work comes down to two problems: the chuck hits the work, or the bit flexes because you cannot get your body behind the drill. A stubby bit solves both. It lets the chuck sit closer to the surface, and its shorter body resists the angled pressure that happens when you drill one-handed or upside down.

This is common in electrical panels, under sinks, inside cabinets, and on assembled equipment where a jobber bit would force the drill into an awkward angle. If you can start the hole with a stubby bit and then switch to a longer bit for depth, you get the best of both.

Hole saws and cutters are a different length decision

Hole cutters are not drill bits, and their length is set by the cutter body and pilot. A carbide hole cutter with a pilot bit and spring ejector is designed for sheet metal, and its cutting depth is limited by the flange and the cutter wall. You cannot substitute a stubby twist bit for a hole saw when you need a large-diameter hole.

For drilling in confined areas with a hole cutter, check the overall length and shank size against your drill and the clearance around the work. A 3/8-inch shank fits 3/8-inch or larger drills, and a tri-flat shank prevents spinning in the chuck. If the cutter cannot fit squarely, a right-angle drill or a shorter cutter is the safer answer.

Sizes, point geometry, and what the catalog does not tell you

A 135-degree split point helps prevent walking on curved or uneven metal, which matters more with short bits because you have less length to correct a wandering start. Cobalt M42 holds up in hard or abrasive metals, while tungsten carbide tips are for sheet metal and thin stock, not for deep holes in thick steel.

The catalog does not list every specification for every product, such as recommended RPM or maximum drilling depth per material. Treat those as decisions you make from the material and your drill, not from a single number. Start slow, use cutting fluid on metal, and let the bit cut rather than pushing harder.

Decision rules for stubby vs jobber

• Hole depth is less than the stubby flute length: Use a stubby bit. There is no reach to gain, and the shorter body resists bending and breakage. If a jobber bit has snapped in this spot before, switch to stubby.
• The chuck or drill body hits the work: Use a stubby bit or a right-angle drill. A jobber bit will force an angled start and an out-of-round hole. If you cannot keep the bit square, change the tool, not the pressure.
• You need to drill through thick material or stacked plates: Use a jobber bit for reach and chip clearance, or drill a pilot with a stubby bit and follow with a longer bit. A stubby bit that bottoms out will rub the shank and burn the edges.
• You need a large-diameter hole in sheet metal: Use a carbide hole cutter with a pilot bit and flange, not a twist bit. Match the shank size to your drill. A hole cutter is a different tool class; do not compare it by length alone.

Products that fit this decision

• 3/16" Stubby Cobalt M42 Drill Bits Stub Drill Length Machine Screw Drill Hog USA: Drill Hog 3/16" Cobalt M42 Stubby Drill Bits, 10 pack, 2-1/4" overall length, 135-degree split point, USA made, lifetime warranty. A short overall length keeps the chuck close to the work and resists flex, while the split point reduces walking on curved or uneven metal. This is the format to reach for when a jobber bit keeps snapping or the drill will not fit.
• 1-3/8" Carbide HoleSaw Hole Saw TcT Tungsten Sheet Metal Hole Cutter Drill Hog: Drill Hog 1-3/8" Carbide Hole Cutter, tungsten carbide tipped, 3" overall length, pilot bit, flange to prevent over-drilling, spring ejector, tri-flat shank, lifetime warranty. For large holes in sheet metal, the cutter body and pilot set the depth and centering, not the twist-bit length. The flange and spring ejector control over-drilling and plug removal, which matters when you are working in a tight panel.
• 1-1/2 Carbide Hole Saw Cutters TcT Tungsten Sheet Metal 1-1/2" Holesaw Drill Hog: Drill Hog 1-1/2" Carbide Hole Cutter TcT, 3/8" shank, tungsten carbide tipped, pilot bit, flange, spring ejector, tri-flat shank, lifetime warranty. The 3/8-inch shank fits 3/8-inch or larger drills, and the tri-flat shank prevents spinning. Check the cutter diameter and shank against your drill before buying, because a hole cutter is not a substitute for a stubby twist bit.

Who should choose which

Best for

• Assembly and repair work where the drill must fit close to the work
• Drilling pilot holes for machine screws in metal brackets and panels
• Anyone who has broken jobber bits in hard or grabby metal
• Electrical, HVAC, and maintenance work in panels and cabinets

Not for

• Drilling deep holes through thick steel or stacked plates where reach is required
• Cutting large-diameter holes in sheet metal, which calls for a hole cutter
• Work where you need long flutes to clear chips continuously