This compact and lightweight corded machine delivers an impressive punch considering its size. It features a variable speed trigger to give the user greater control and has an SDS-Plus type bit holder, making changing drill bits effortless. For larger drilling jobs, the lock-on feature will allow you to relax your trigger finger and just concentrate on the drilling. It can drill up to 18mm diameter holes using a TCT drill bit, and when combined with a diamond core, can drill an impressive diameter of 65mm. It delivers 1.4 Joules of impact energy up to 4800 times per minute making light work of masonry and concrete. The HR1840 can also be used with timber and steel thanks to the rotation-only mode switch that disables the impact action. Features: Easy to use SDS-Plus drill bit holder. Can drill up to 18mm diameter holes. Drills up to 65mm diameter cores. Rotation stop allows 24mm in wood, 13mm in steel. Delivers 1.4 Joules of impact energy.