4 x Hilti DD – BI 18/320 PL 18mm x 320mm Diamond Core Drill Bit High End 2015355. For Sale – 4 x New / Unused (But Slightly Rusting In Places + Damaged Packaging) Hilti DD-BI 18/320 PL. 18mm x 320mm Diamond Core Drill. You may also be interested in…. View more great items. 1 x Hilti TE-C 16/16 16mm x 160mm (100mm W/L) SDS+ Drill Bit 2037103 SDS Masonry. 1 x Hilti TE-C 16/21 16mm x 210mm (150mm W/L) SDS+ Drill Bit 2037081 SDS Masonry. 2 x Hilti TE-C 16/16 16mm x 160mm (100mm W/L) SDS+ Drill Bit 2037103 SDS Masonry. 4 x Hilti TE-C 16/16 16mm x 160mm (100mm W/L) SDS+ Drill Bit 2037103 SDS Masonry.