Answering the question “which SDS drill bits are the longest?” this guide highlights long, carbide-tipped and specialty bits built for deep holes in brick, concrete, stone, and masonry. These options are ideal for professionals and serious DIYers who need maximum drilling depth without sacrificing durability. The top picks target different drills, workpieces, and depths to help you choose the right bit for your project.
The top picks below are best suited for: heavy-duty drilling where long reach matters, including concrete cores, masonry anchors, and deep channeling. Choose a single long bit for consistent depth and a bit set for versatility across materials and hole sizes. The summary table offers a quick comparison to aid in decision-making.
| Product | Best For | Approx. Length | Shank Type |
|---|---|---|---|
| 3/4 Inch x 39 Inch SDS Plus Rotary Hammer Drill Bit | Very long holes in brick, stone, concrete | 39″ | SDS Plus |
| 4-Piece 12in SDS Plus Drill Bit Set | Varied hole depths in masonry | 12″ | SDS Plus |
| 1″ x 47″ SDS Plus Rotary Hammer Bit | Deep concrete drilling | 47″ | SDS Plus |
| SDS Plus Carbide Cross Tip Set (10-Piece) | Long reach with multiple sizes | 6″ bits | SDS Plus |
| Extra Long SDS MAX Hammer Drill Bit 1″ x 66″ | Extremely long penetrations with SDS MAX | 66″ | SDS MAX |
3/4 Inch Long SDS Plus Rotary Hammer Bit
This 3/4″ x 37” x 39″ SDS Plus bit is designed for deep masonry drilling. It’s carbide tipped for durability in brick, stone, and concrete. The long length supports deep anchor installation and core drilling where reach is critical. Best for professionals needing one long, reliable option. A potential limitation is that longer bits can require more drill control and steadier handling. Compatible with Bosch, DeWalt, Hitachi, Hilti, Makita, Milwaukee, and other SDS Plus tools.
4-Piece 12in SDS Plus Drill Bit Set
This four-piece set includes 1/4″, 5/16″, 3/8″, and 1/2″ bits, each at 12″ length. Carbide-tipped, these bits are built for masonry applications such as brick, stone, concrete, and stucco. Best for hobbyists and contractors who need quick swap options for multiple hole sizes at depth. The set’s long reach is balanced by practical diameter options. Caution: ensure the drill is compatible with SDS Plus bits and use a drift to manage long bit wobble in hard materials.
1″ x 47″ SDS Plus Rotary Hammer Bit
This 1″ x 47″ long SDS Plus bit provides extended reach for concrete drilling tasks. Its 47-inch overall length makes it suitable for installations requiring deeper holes without repositioning the drill. Best for professional use where maximum depth is essential and the drill supports SDS Plus shanks. Consider the weight and steering required for very long bits in dense concrete, as control can affect hole accuracy.
SDS Plus Carbide Cross Tip Drill Bit Set (10-Piece)
This 10-piece set covers common hole sizes from 5mm to 12mm with a 6″ length. Carbide-tipped cross tips and a strong steel body deliver durability and heat resistance for drilling into concrete, brick, and masonry. Best for projects requiring multiple hole diameters with a single purchase. A limitation is shorter length compared to the longest options, so use this when long reach is not required and portability matters more.
Extra Long SDS MAX Hammer Drill Bit 1″ x 66″
As an SDS MAX option, this 1″ x 66″ bit is designed for extremely deep penetrations. The large diameter supports substantial concrete drilling work and is best used with SDS MAX-compatible hammer drills. Best for industrial or heavy construction tasks where deep boreholes are needed. A potential drawback is that SDS MAX bits require compatible tools and can be heavier to maneuver in overhead or tight spaces.
Buying Guide
What to consider when selecting long SDS bits:
- Drill compatibility: Ensure your hammer drill accepts SDS Plus or SDS MAX bits as labeled. The longest bits require a compatible tool to avoid fit issues.
- Hole depth vs. diameter: Longer bits are useful for deep holes; pair with the right diameter to match anchors, rebar, or cores you plan to drill.
- Carbide tips: Carbide tips offer extended life in hard materials like concrete and stone, but they can be more brittle if used improperly. Use steady pressure and proper coolant or dust control where applicable.
- Shank design: SDS Plus and SDS MAX shanks are common; double-check the shank type to prevent slipping or wobble.
- Debris removal: Bit designs with efficient spirals remove dust quickly, improving speed and reducing sticking in masonry.
- Depth management: For very long bits, consider a bit guide or drill stand to maintain straight holes and reduce fatigue.
FAQ
- Which SDS bit is longest? Among the options listed, the 1″ x 66″ SDS MAX bit offers the greatest overall length, suitable for extremely deep holes when using SDS MAX tools.
- Do I need carbide tips on long bits? Carbide tips provide longer life in hard materials like concrete, brick, and stone, especially for extended drilling sessions.
- Can I use SDS Plus bits in an SDS MAX drill? Most SDS MAX drills accept SDS Plus bits with proper adaptors or only if the drill’s chuck supports SDS Plus shanks; always verify compatibility.
- Are long bits harder to control? Yes, longer bits can exhibit more whip and deflection. Use proper drilling technique, slower feed rates, and, if possible, a guide or stand.
- Which set offers the best value for multiple hole sizes? A multi-size set like the 10-piece carbide cross-tip set provides versatility across common diameters with a single purchase.
- When should I choose a single long bit over a set? Choose a single long bit for a specialized, deep hole project where depth matters more than variety; choose a set for flexibility across different hole sizes and tasks.