This 5piece stainless steel shaft collar drill stop ring set provides precise depth control for woodworking projects. The set includes five rings in sizes 3 mm, 4 mm, 6 mm, 8 mm and 12 mm, designed to function as depth stoppers on drill shafts. Made from corrosion resistant stainless steel, these stops are durable for long term workshop use and can be repeatedly installed and removed as needed. Key benefits Ensure drilling depth accuracy: stop rings provide a repeatable limit to drilled holes, improving consistency across parts. Durable and corrosion resistant: stainless steel construction stands up to regular tool use and workshop environments. Size versatility: five common bore sizes (3, 4, 6, 8, 12 mm) cover multiple shaft diameters. Reusable and inexpensive upgrade: simple, low maintenance solution for better drilling results. Easy to swap and position: quickly change rings as you switch between projects or shafts. Key attributes Material: stainless steel for strength and corrosion resistance Function: depth stopper / shaft collar designed to clamp around a drill shaft to control drilling depth Sizes included: 3 mm, 4 mm, 6 mm, 8 mm, 12 mm Package: 5 pieces Intended use: woodworking applications that require controlled drilling depth Applications and use cases Furniture and cabinet making: set the ring to a consistent depth for pocket holes, dowel holes, or fixture holes to ensure uniform insertion depth. Jig and drill guide setups: place the appropriate size on the guide shaft to achieve repeatable hole depths across multiple workpieces. Small mechanical assemblies in woodworking projects: use as spacers or depth references on shafts or rods within custom jigs and fixtures. How to use Select the ring with a bore matching your shaft diameter. Slide the ring onto the shaft to the desired position to establish the drilling depth. Secure as needed per your tooling setup, and drill. When finished, remove and store for future use. Care and maintenance Wipe clean after use to remove dust and debris. Dry storage helps prevent any surface spotting and keeps rings ready for next project. This set delivers versatile, reliable depth control for woodworking, combining multiple common sizes in a durable stainless steel format. It supports consistent results across projects and simplifies setup for repeat drilling tasks.