"SUPÉR HP Carbide Burs (1.4mm head size) HP Shank used with Straight Hand pieces (44.5 mm), ROUND The carbide burs provide the highest combination of precision ground cutting edges for consistent cutting performance at one of the best values you can find. The burs adhere to stringent QA standards to ensure strength, performance and durability. For low speed straight handpiece Length: 44.5mm Shank diameter: 2.35mm Tungsten carbide material For dental lab or clinic use"