Use an RCD device if using an electric power tool

not only does it provide less start-up impact on gears

15Pce Spanner Reverse Gear Set K3016 by Kincrome

Includes 2 x 4

92mm Bi-Metal Hole Saw 7010-92 by Bordo Pole Saw Bar Use an RCD device ifBordo bi metal hole saws are premium quality, general purpose saws suitable for a wide variety of materials and applications. The high speed steel cobalt (HSS Co) cutting edge provides shock resistant teeth and resists tooth strippage. 4 6 positive tooth configuration allows for fast, smooth cuts and less vibration. Features: HSS Co Cobalt cutting edge 4 6 variable tooth configuration 48mm (1 7 8") depth of cut 5mm (3 16") thick heavy duty backing