brand new and high quality Features: Twist screws on the same axis, and screw nut below the board plane, drill collars can adjust up and down. Woodworking chamfering device, with drill bit, hexagonal quick-change handle, with drill sleeve. The main body is 45# carbon steel, and the stop drill sleeve is equipped with adjusting screws. Also has chamfering function. The existence of the drill sleeve also facilitates the customer to adjust the drilling depth, which is convenient and efficient. Apply to with a clamp or joint drilling machine, suitable for drilling in the hard wood and wood floor, machine screw for wood screw. High strength and hardness. Specification: Material: 45# Carbon Steel Drill Bit Length: approx.116mm/4.57in Stop Drill Sleeve: 30x23mm/20x22mm Color: As pictures shown Optional Styles: 02, 04, 05 Quantity: 1 Pc or 1 Set Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x 4mm Countersink Drill Bit or 1 x 5mm Countersink Drill Bit or 2 x Countersink Drill Bit + 1 x Wrench (other demonstration accessories in the picture is not included.)