Description:

(Black) 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
(Golden) Drill Chuck, compatible with most of rotary tools used in hardware, hobby, home, etc
Suitable for installation inside diameter of less than 4.5mm drill, electric grinding, hanging mill, hose above
Durable and practical

Specification:

(Black) Shaft Chuck+Hex Wrench:
Material: High Carbon Steel
Size: Approx. 3, 4, 5, 6, 8, 10, 12, 16 mm/ 0.12, 0.16, 0.20, 0.24, 0.31, 0.39, 0.47, 0.63 inch
(Golden) Drill Collet Chuck Bits:
Material: Brass
Overall Length: Approx. 17mm / 0.66 inch
Shank Diameter: Approx. 4.8mm/ 0.19 inch
Clamping Diameter: Approx. 0.5, 0.8, 1.0, 1.2, 1.5, 1.8, 2.0, 2.4, 3.0, 3.2 mm
(0.020, 0.031, 0.039, 0.047, 0.059, 0.071, 0.079, 0.094, 0.118, 0.126 inch)

Package Includes:

8 Pieces of Drill Bit Depth Stop Collar
1 Piece of Hex Wrench
10 Piece of Drill Chuck