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<blockquote data-quote="PaulR" data-source="post: 733132" data-attributes="member: 176256">In order to drill into differrent materials, drill bits are made out of different materials and to different designs.To drill into sheet steel (which is what the bracket is made of) you need something called a high speed twist drill (HSS drill bit).&nbsp; These are made of a type of steel which can withstand the high temperatures generated on the cutting end of the drill bit.A drill bit for wood looks somewhat similar but instead of having an angled end has a flatter end with a small point in the centre so that it doesn't wander off across the wood.&nbsp; The flutes at the side are also wider to clear the wood shavings away and they aren't usually made for high temperatures.&nbsp; You can, of course, drill wood with an HSS drill but not the other way round. The flutes tend to get clogged with sawdust though.A masonry bit look similar to an HSS bit but has a special toughened blade brazed into the cutting end which doesn't shatter when cutting brick and stone.&nbsp; A variation on this is for an impact drill which is just a bit stronger and slightly differently made.&nbsp; The cutting blade is what determines the diameter of the hole and the fluted shaft is smaller in diameter to shift the brick dust.You should use the drill bit to suit the material.&nbsp; There are some supposed multi-purpose drill bits but I've not been too impressed with them as they sem a compromise.</blockquote>

[QUOTE="PaulR, post: 733132, member: 176256"] In order to drill into differrent materials, drill bits are made out of different materials and to different designs. To drill into sheet steel (which is what the bracket is made of) you need something called a high speed twist drill (HSS drill bit). These are made of a type of steel which can withstand the high temperatures generated on the cutting end of the drill bit. A drill bit for wood looks somewhat similar but instead of having an angled end has a flatter end with a small point in the centre so that it doesn't wander off across the wood. The flutes at the side are also wider to clear the wood shavings away and they aren't usually made for high temperatures. You can, of course, drill wood with an HSS drill but not the other way round. The flutes tend to get clogged with sawdust though. A masonry bit look similar to an HSS bit but has a special toughened blade brazed into the cutting end which doesn't shatter when cutting brick and stone. A variation on this is for an impact drill which is just a bit stronger and slightly differently made. The cutting blade is what determines the diameter of the hole and the fluted shaft is smaller in diameter to shift the brick dust. You should use the drill bit to suit the material. There are some supposed multi-purpose drill bits but I've not been too impressed with them as they sem a compromise. [/QUOTE]

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