Stainless steel shaft collar drill stop ring set for woodworking. This fivepiece set includes bore sizes 3 mm, 4 mm, 6 mm, 8 mm and 12 mm, with an outer diameter of 14 mm. Made from stainless steel, these rings function as depth stops and shaft collars to help you achieve repeatable, accurate results in drilling and machining. Key benefits Precise depth control and shaft positioning for repeatable holes and controlled drilling depth Versatile bore sizes in one set to fit multiple drill bits or shafts Durable, corrosionresistant stainless steel construction for long service life Standard outer diameter of 14 mm supports reliable fit on compatible shafts and fixtures Compact and easy to store, suitable for workshops and mobile setups Key attributes Functionality: depth stop ring and shaft collar Compatibility: bore sizes 3 mm, 4 mm, 6 mm, 8 mm, 12 mm; outer diameter 14 mm Size: 5 pieces Material: stainless steel Performance: robust, accurate, repeatable in woodworking and machining tasks Use cases Set drilling depth on wood projects such as pocket holes and dowel holes to ensure consistent results Position and lock components on shafts or drill bits in woodworking machinery for repeatable setups Serve as spacers or alignment rings in jigs or fixtures to improve accuracy and repeatability across jobs