Marcrist MRCPC850107 Diamond Core Drills. PC850 Diamond Percussion Core 107mm x 165mm. Item weight: 1.38 Kilograms. Global Trade Identification Number: 59. Product Dimensions:? 11.2 x 11.51 x 19 cm; 1.38 kg. Item model number:? MRCPC850107. Item Weight:? 1.38 kg.