Attaches to drill bits with a set screw just like conventional stop collars, but that''''s where the similarity ends: Under the Slip Stop polymer boot is a special low friction polymer disc bearing that allows the boot to rotate freely when it contacts the stock. Works with True Position Drill Guide line boring extensions. Made in USA • Fits 5mm drill bits Ideal for True Position Drill Guide line boring products Won''''t mar or burn your work piece Stainless Steel
