Best Sale Lee Valley Stop Collars For Drill Bit/Countersink/Counterdrill Units

Use in combination with our countersinks/counterdrills to set the unit for a wide range of screw lengths for everything from flush countersinking to a full 1/2″ of counterdrill. The 3/8” stop collar works for #5 to #9 screws, and the 1/2″ stop collar works for #10, #12 and #14 screws. Also available in boxed sets with taper drill bits, stop collars and hex keys.