Precision drill stop collar set for consistent, repeatable drill depth control Key benefits Ensures precise, repeatable drilling depth so holes are identical every time — reduces rework and improves fit in assemblies. Secure, damage-free attachment to the drill bit keeps collars from slipping while protecting the bit surface. Built from durable carbon steel and hardened steel collars for long service life and reliable performance on the job. What it does and why you need it Provides positive depth stops for a wide range of drilling tasks, eliminating guesswork when you must hit the same depth repeatedly. The split-ring design clamps tightly around the bit while the screw-type fastening protects the bit finish and prevents marring. Hardened collars accept a wrench for rapid tightening and removal, delivering consistent accuracy across different bit types. Compatibility and construction Split rings made from carbon steel for strong, secure positioning on the bit. Hardened steel collars with wrench-compatible fasteners for secure tightening and long-term durability. Designed to work with multiple drill bit types — including twist bits, spade bits and masonry bits — so the set can be used across a variety of jobs. Typical use scenarios Cabinet installation: set consistent hole depths for shelf pins, hinge screws and dowel placements to ensure uniform assembly. Furniture assembly and joinery: control mortise and dowel depths during repetitive drilling to achieve tight, reliable joints. Hardware installation: install locks, handles and catches at the correct depth every time to avoid overdriving or misalignment. Practical features Easy to position and tighten with a wrench for tool-free approximate adjustment and firm final clamping. Protects drill bit surfaces while providing a positive mechanical stop for dependable repeatability. Suitable for professional tradespeople, woodworkers and DIY enthusiasts who require consistent drilling depths on cabinetry, furniture and hardware work. Materials and performance summary Split rings: carbon steel construction for secure gripping. Collars: hardened steel with screw-type fastening; wrench-compatible for accurate tightening. Works with twist, spade and masonry bits to deliver repeatable depth control across common drilling tasks.