Carbide Burr Set, Die Grinder Bits, 20 Pcs 1 8" Shank Double Cut Tungsten Carbide Rotary Burrs Set Compatible with Dremel for Metal Carving Wood Working Engraving Polishing chaganju you'll always have enough bags Magnification Strength: 3.50 you'll always have enough bags on hand aquaponics and coco coir cultures 【DOUBLE CUT DESIGN】Double grooves die grinder bits are designed of crossed lines which make it more suitable for low density material like wood platics and aluminum with fast chip removal 【PREMIUM QUALITY】These carbide burr sets are made of Tungsten Carbide steel which has long working life with high precision shape