Dewalt DT9830 Extreme 2 SDS Plus Drill Bits 8mm x 210mm (Pack of 10) The Dewalt DT9830 is a pack of 10 Extreme 2 SDS Plus Drill bits of superior carbide grade which are all 8mm in Diameter with a working length of 150mm. The Innovative EXTREME 2 SDS-Plus drill bit is amongst the best in terms of its speed, life and endurance. Features: Superior carbide grade for long life and greater durability Optimised flute design allows efficient debris removal Hardened body for extra strength and reduced breakage New tip design ensures better bit penetration, longer life, faster drilling and greater durability Specification: Diameter: 8 mm Length: 210 mm Working Length: 150 mm Pack Qty: 10 Weight: 1.5kg