Features:
Made of Stainless steel material, continued in use
Suit for high-carbon steel drills and positively locks anywhere along the bit.
Drill Limited Sound, clamping device, and positioner.
Screw-type collars will not damage bits.
Used for drilling limit, and prevent drilling too deep

Specification:
Size (inside diameter) : 3,4,5,6,7,8,9,9.5,10,12,14,16mm
Material: stainless steel
Weight: 105 g/3.7 / (approx.)

Package list:
12 * Spacing Sound
1 * Hex Wrench

Note:
Please note that the new type and old type of this product will be sent randomly, and make sure you do not mind before ordering.

This versatile set includes collars ranging from 3mm to 16mm, offering a wide range of drilling options for various woodworking or metalworking projects.
Each collar in the set features an adjustable limit sound, allowing users to customize drilling depths according to their specific requirements. The collars are compatible with wrenches, enabling hassle-independent installation and adjustment for seamless drilling works.