A high-resolution product image of a silver 7.5-inch Crescent solid auger drill bit with a 3/8-inch diameter, showcasing the screw-point lead, orange fluted body, and laser-etched 3/8-inch size marking on the hex shank.
A silver 7.5-inch Crescent solid auger drill bit with a 3/8-inch diameter shown at an angle, featuring a screw-point tip, dual orange cutting flutes, and a 1/4-inch hex shank.
A profile shot of the Crescent CDAG-7521 solid auger bit, displaying the screw-point tip, bright orange dual-flute body, and the silver 1/4-inch hex shank with a laser-etched 3/8-inch size marking.
A detailed close-up of the triple-sharpened cutting head and threaded lead screw of the Crescent auger bit, showcasing the precision edges and high-speed steel construction.
A close-up view of the 1/4-inch quick-release hex shank on a silver Crescent auger bit, highlighting the precision-machined steel and the orange brand collar with the black Crescent logo.
The Crescent 7.5-inch solid auger bit is shown inside its clear 2-piece corkscrew storage tube, with the 3/8-inch diameter and wood-drilling application clearly visible on the retail label.
A high-resolution product image of a silver 7.5-inch Crescent solid auger drill bit with a 3/8-inch diameter, showcasing the screw-point lead, orange fluted body, and laser-etched 3/8-inch size marking on the hex shank.
A high-resolution product image of a silver 7.5-inch Crescent solid auger drill bit with a 3/8-inch diameter, showcasing the screw-point lead, orange fluted body, and laser-etched 3/8-inch size marking on the hex shank.
A silver 7.5-inch Crescent solid auger drill bit with a 3/8-inch diameter shown at an angle, featuring a screw-point tip, dual orange cutting flutes, and a 1/4-inch hex shank.
A profile shot of the Crescent CDAG-7521 solid auger bit, displaying the screw-point tip, bright orange dual-flute body, and the silver 1/4-inch hex shank with a laser-etched 3/8-inch size marking.
A detailed close-up of the triple-sharpened cutting head and threaded lead screw of the Crescent auger bit, showcasing the precision edges and high-speed steel construction.
A close-up view of the 1/4-inch quick-release hex shank on a silver Crescent auger bit, highlighting the precision-machined steel and the orange brand collar with the black Crescent logo.
The Crescent 7.5-inch solid auger bit is shown inside its clear 2-piece corkscrew storage tube, with the 3/8-inch diameter and wood-drilling application clearly visible on the retail label.
A high-resolution product image of a silver 7.5-inch Crescent solid auger drill bit with a 3/8-inch diameter, showcasing the screw-point lead, orange fluted body, and laser-etched 3/8-inch size marking on the hex shank.
Crescent

Crescent Solid Auger Drill Bit CDAG-7521 3/8 Inch 7-1/2 Inch (1/4 Hex Shank Triple Sharpened HSS 10X Fast Wood Boring Timber Framing)

In stock
SKU: CDAG-7521
$11.95 USD

Description

crescent trusted by the trades logo Logout

Crescent CDAG-7521 7-1/2-Inch Solid Auger Drill Bit 3/8-Inch Diameter

The Crescent CDAG-7521 is a 3/8-inch diameter by 7-1/2-inch overall length solid auger wood-boring drill bit engineered with a 1/4-inch quick-release hex shank for structural lumber drilling up to 6 inches deep. Built with triple-sharpened high-speed steel (HSS) cutting edges that penetrate timber up to 10 times faster than conventional auger bits, this impact-rated boring tool delivers 40 percent more cuts per cordless battery charge. Featuring an optimized 2-flute core geometry designed to evacuate wood chips rapidly without binding, its precision-machined lead tip prevents bit walking to give timber framers, electricians, and carpenters clean, straight penetrations through thick wood beams.

Best Used For:

  • Electrical Rough-In Wire Running: Boring precise 3/8-inch pass-through holes through 2x4 and 2x6 wood studs to pull small-diameter electrical cables and thermostat wires.
  • Structural Timber Framing & Deck Post Drilling: Sinking clean 6-inch deep holes through structural posts, joists, and pressure-treated lumber for lag bolt alignment.
  • Plumbing Line & Cabinetry Passage Hole Cutting: Drilling smooth wood penetrations through flooring underlayment, subfloors, and wood framing without splintering exit faces.

Key Performance & Safety Features

  • Triple-Sharpened HSS Cutting Edges: Precision-milled high-speed steel edges cut wood fibers rapidly to achieve 10X faster drilling performance.
  • 40% Extended Battery Runtime Flutes: Low-friction tip geometry lowers motor current draw to deliver more holes per cordless drill battery charge.
  • High-Speed 2-Flute Chip Evacuation: Deep dual-flute channels clear wood shavings quickly to prevent clogging, thermal buildup, and bit binding.
  • Universal 1/4-Inch Quick-Release Hex Shank: Impact-rated hex base fits securely into 1/4-inch impact driver chucks and quick-change drill adapters.
  • Precision-Machined Tracking Lead Tip: Center spur establishes immediate wood grip to prevent bit walking on angled or smooth lumber surfaces.
  • Heavy-Duty Solid Core Construction: Forged alloy steel body resists torsional bending during deep drilling through dense hardwoods and knots.

What's Included

  • (1) Crescent 7-1/2" x 3/8" Solid Auger Drill Bit (CDAG-7521)

Technical Specifications

Brand Manufacturer Crescent® Tools
Model Part Number OEM SKU CDAG-7521
Drill Bit Type Configuration Solid Core Wood Auger Bit
Cutting Diameter Width 3/8 inches (0.375 in / 9-53/100 mm)
Overall Tool Length Dimension 7-1/2 inches (7.5 in / 190-5/10 mm)
Maximum Usable Drilling Depth 6 inches (152-4/10 mm)
Shank Type Connection 1/4 inch Quick-Release Hex Shank (6.35 mm)
Flute Geometry Architecture Deep 2-Flute Structure
Point Style Geometry Brad Point Center Lead Spur
Relative Drilling Speed Rating 10X Faster vs Standard Auger Bits
Target Primary Material Hardwood, Softwood, Pressure-Treated Lumber
Net Unit Weight 2-89/100 oz (0.18 lbs / 81.9 g)
Universal Product Code UPC 697099367888

Pro-Tip: Maintain high rotational RPM and let the lead tip pull the bit naturally into the wood; avoiding excessive manual pushing pressure ensures smooth chip ejection and prevents bit binding in deep 6-inch holes.