x8 3-12mm Countersink Drill Bit Set Adjustable Depth Stop Collar

Direct Hardware

$13.99 

8pcs Drill Depth Collar

Diameters that are included: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm

Allen key included 

Used for attaching to drill bit to set the depth of the hole you require with ease