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There are no more items in your cartThis stop collar is specifically made to fit the shank of the UJK Parf Guide 20mm drill bit. However it will fit other 10mm shank drill bits. The one-piece single split design offers greater clamping force compared to a set-screw shaft collar. Unlike a locking grub screw type, a split collar grips the shaft without leaving score marks. Internal diameter 10mm.