SIZE: 25 mm Length by 21 mm Diameter SIZES AVAILABLE: 12-65mm Diameters in both 25mm or 50mm Depth. 3 Piece & 6 Piece Cutter Kits Also Available. MADE IN BRITAIN: Manufactured From Fully Ground M2 Steel ACCURATE: Reamed Quality Holes with an Accurate, Smooth Finish in One Pass UNIVERSAL FITTING: 19mm Weldon Shank With 2 Machined Flats - Fits Evolution & Most Brands Standard Mag Drills Pilot Pins Sold Separately 21S, Weight: 0.24030386558 pounds, Manufacturer: Evolution