Brand new and high quality.8-PC Drill Bit Depth Stop Collar.Drill Bit Depth Stop Collar.Drill Limited ring, clamping device, positioner.Works with both standard and brad-point bits.Setscrew type collar will not damage bits.Positively locks anywhere along the bit.Hardened and Tampered.High Carbon Steel Drills.Sizes:3mm 4mm 5mm 6mm 8mm 10mm 12mm 16mm.Package Included:8 x Drill Bit Depth Stop Collar1 x Hex WrenchNO Retail Box. Packed Safely in Bubble Bag.