The DD500X workshop model is designed for durability and has the flexibility required to sharpen the largest range and most popular sizes of dull or broken bits-including split points and masonry bits. Increase capacity with optional ¾ chuck accessory. New 'Push to Stop' design on the drill point splitting port will not allow you to over split the bit point. User replaceable diamond sharpening wheel designed for simple replacement. One piece alignment system improves precision, and adjustability. Longer jaws hold bit more precisely and jaw guides eliminate jaw twisting on small bits. Cast aluminum point angle shuttle for added durability. For the serious drill bit user DIY, hobbyist, and professional. Sharpens 3/32 1/2drill bits Sharpens High-speed Steel, Carbide, Cobalt, TiN-coated and Masonry bits. Sharpens both 118 degree and 135 degree point angles. 180 grit wheel comes standard. Capacity is 2.5mm - 14mm.