• Hole drilling tool: They will quickly and easily help you drill holes to exact depths and are ideal for production work and repeated drilling by positively locking anywhere along the bit
• Durable material: The durable carbon steel tool will stay sturdy when tightened and is specially designed not to damage the bits
• Applicable: They are used as shaft collars on machinery and can be used on twist drill bits or brad point drills or any type of bit to prevent excessive drill bit penetration and for any job that uses a bit and needs precision

Specifications:

• Material: Carbon steel
• Limiting ring diameter: 3MM, 4MM, 5MM, 6MM, 8MM, 10MM, 12MM, 16MM