[High-Quality Construction]Engineered from robust high-grade steel, this set of drill stop collars guarantees durability and resilience against wear and tear. Ideal for frequent usage, these collars maintain their integrity, ensuring a long-lasting addition to your toolkit. [User-Friendly Design]Each collar in the set is distinctly marked with imperial sizes that are to fading, even with regular use. This feature enhances user efficiency by allowing quick and accurate selection, reducing downtime and increasing productivity on the job. [ Drilling Control]Featuring a split ring design, these drill stop collars provide meticulous control over drilling depth. This is crucial for tasks requiring consistent and precise hole depths, such as in manufacturing or repetitive drilling operations, ensuring high-quality results every time. [Versatile Application]Suitable for a wide range of drilling tasks, these collars can be used with drill types including fried dough twists drills, woodworking drills, multi-function drills, and ceramic wall drills. They prevent over-penetration of drill bits, making them essential for work. [Comprehensive Set]The package includes a versatile range of collar sizes: 1/8 inch, 3/16 inch, 1/4 inch, 5/16 inch, 3/8 inch, 7/16 inch, 1/2 inch, and 5/8 inch, along with an Allen wrench. This assortment ensures compatibility with different drill models and sizes, catering to diverse drilling needs. Description/Features: 1. Drilling Depth Adjustment: The split ring design of our stop collars allows for meticulous adjustment of drilling depths. This feature ensures consistent and accurate hole depths, making it essential for production work where uniformity is crucial. 2. User-Friendly: Each collar is distinctly marked with its imperial size in a permanent, easy-to-readformat. This quick identification aids in selecting the correct collar size swiftly, enhancing workflow efficiency. 3. Construction: Crafted from heavy-duty stainless steel, these collars are built to withstand rigorous use, ensuring and reliability in any workshop environment. Specifications: Material: Heavy-duty stainless steel Size Identification: Clearly marked imperial sizes Color: Black Package Contents: 8 Pc Stop Collar 1 Pc Allen Wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.