"The Air Capital 5-Pc. Drill Stop Set features coiled-spring drill stops that can be set to the desired hole depth and that slide over drill bits to prevent over- and under-drilling. Design reduces snapping of bits, damage to drilled material and surface marring by chucks. Pieces qty. 5, Accessory Type Drill stop. Color-coded drill stops Sizes to fit 3/32in., 1/8in., 5/32in., 3/16in. and 1/4in. bits"