Product Description
Meterial:Carbon steel.
Sizes:3mm 4mm 5mm 6mm 8mm 10mm 12mm 16mm.
M3: inner diameter: 3.2 mm, outside diameter is about: 9.8 mm, thickness: about 3.5 mm, height: about 8 mm
M4: inner diameter: 4.2 mm, outside diameter is about: 9.8 mm, about the thickness: 3 mm, height: about 8 mm
M5: inner diameter: 5.2 mm, outside diameter is about: 11.8 mm, about the thickness: 3.4 mm height: about 8 mm
M6: inner diameter: 6.2 mm, outside diameter is about: 11.8 mm, thickness: about 3 mm height: about 8 mm
M8: inner diameter: 8.3 mm, outside diameter: about 16 mm, about the thickness: 3.9 mm height: about 8 mm
M10: inner diameter: 10.3 mm, outside diameter is about: 18 mm, thickness: about 3.8 mm height: about 8 mm
M12: inner diameter: 12.2 mm, outside diameter is about: 20 mm, thickness: about 3.9 mm height: about 8 mm
M16: inner diameter: 16.2 mm, outside diameter is about: 24 mm, thickness: about 4 mm height: about 8 mm

Feature
Essential for precision drilling jobs, pays for itself by preventing errors and material waste.
Stops can be set at any point on drill bit flute or shaft,quick & easy adjustment.
Gives exact drilling results,prevents under- and over-drilling.
Work with any twist-type bit for wood, metal, concrete or masonry; power drills, drill presses.
Hardened steel collars with hex set-screws; includes hex key for tightening and loosening collars.

Package Included:
8 x Drill Bit Depth Stop Collar
1 x Hex Wrench We are committed to create a comprehensive platform of vogue and health.Here to find the products you want.We will sincerely service for you.Hope you enjoy shopping time.We want to go that one step further and offer our personal shopping service to our customers. Everything we offer is focused on your budget and is individually tailored to your needs. We want you to have the best. Enjoy Shopping With Us!The Shipping time is about 2 weeks.You can leave the message first ,Our working time is Monday to Friday 9:00am-18:30pm.,we will reply you asap.