8-Piece Drill Bit Depth Stop Collar Set 3–16mm | Woodworking

Precision Depth Control for Every Woodworking Project

Take the guesswork out of drilling with this 8-piece steel drill bit depth stop collar set. Designed for woodworkers, hobbyists, and DIY enthusiasts, these collars clamp securely onto drill bits ranging from 3mm to 16mm, giving you consistent, repeatable drilling depths every single time. Whether you're installing cabinet hardware, drilling dowel holes, or setting pocket screws, these depth stop rings keep your work accurate and professional.

Key Features

• 8-piece set covering sizes 3, 4, 5, 6, 8, 10, 12, and 16mm — fits the most common drill bit diameters
• Durable steel construction — built to withstand repeated use across hardwood, softwood, plywood, and MDF
• Steel bearing ball locking mechanism — the set screw with integrated bearing ball distributes clamping force evenly, preventing bit damage and collar slippage
• Easy to set — slide to your desired depth, tighten the set screw, and drill with confidence
• Compatible with standard drill bits, brad-point bits, and Forstner bits of matching diameters
• Works with corded drills, cordless drills, and screw guns

Specifications

Perfect For

• Cabinet making and furniture assembly
• Dowel joinery and pocket hole drilling
• Hinge and hardware installation
• Craft and hobbyist woodworking projects

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For more information on safe tool use and workshop best practices, visit the OSHA Woodworking Safety Guidelines.

Frequently Asked Questions

Q: What drill bit sizes are included in this 8-piece depth stop collar set?

A: The set includes collars sized to fit drill bits of 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, and 16mm — covering the most frequently used diameters in woodworking and general DIY drilling tasks.

Q: How does the steel bearing ball locking mechanism work?

A: Each collar features a set screw with an integrated steel bearing ball. When tightened, the ball contacts the drill bit shank and distributes the clamping load evenly around the surface, preventing marring or deformation of the bit while providing a firm, slip-resistant hold.

Q: Are these depth stop collars compatible with cordless drills and screw guns?

A: Yes — these collars are compatible with any standard corded or cordless drill, drill press, or screw gun. Simply slide the collar to your desired depth on the bit shank, tighten the set screw, and begin drilling.

Q: Can I use these collars on materials other than wood?

A: While the set is optimized for woodworking applications such as hardwood, softwood, plywood, and MDF, the steel collars can also be used on plastic and other softer materials when drilling with appropriate bits.