Burr grinders are of two types - conical burrs and flat wheel burrs. The burrs are usually made of tungsten carbide or diamond. It maintains dimensional tolerances and does not create burrs or sharp edges. Burrs in drilled holes cause fastener and material problems. Burrs in moving parts increase unwanted friction and heat. However, the occurrence of rough edges known as burrs are commonplace on slit edges. Burrs and die rolls are typical defects of trimmed surfaces. The infructescences form stellate spherical burrs about one to two centimeters in diameter. "Tough-Tufted Prickly Snick-Berry Switch" (a switch-esque truncheon with prickly burrs). For all solid burrs, one movement is required to remove the first piece or pieces. There may be minimal burrs on the exit side of the cut. Mr. Black and Queenie return to find Eddie viciously beating Burrs. Queenie is afraid that Burrs will be killed if it is not stopped. All solid burrs are therefore level 1. Kate tries to kiss Burrs, but he pushes away.