▲8x CENTRE POINTS PIN - two of each size 1/4", 5/16", 3/8" and 1/2" diameter.
▲FUNCTION - Internal centering pin locates center of dowel for accurate drilling.
▲CHROME PLATED - will not to mark wood, Used for locating according to corresponding hole.
▲8x DRILL CHUCK - Internal Diameter: 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 5/8inch.
▲WIDE APPLICATION - works with both standard and brad-point bits, For use on twist drill bits or brad point drills to prevent excessive drill bit penetration.