Stop Collar, 1/2", Fits #10-12 Screw Bits
The combination of a quality high-speed tapered drill with a countersink and stop collar, in conjunction with the correct plug cutter, is by far the best way to prepare fine work for wood screws....
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• Designed to be used on most counterbores and countersinks
• Adjustable for varying counterbore depths
• Collars held solidly in place with two set screws
• 1/2" diameter; fits #10-12 screw bits