What is one downside of using compound/stepped drill bits?

The downside of using compound or stepped drill bits relates to the potential for these tools to leave holes in the base metal. When employing a compound drill bit, the design allows for the tool to create a taper and widen the existing hole as it progresses through the material. This design is particularly effective for enlarging holes or drilling through multiple layers, but it can also result in the leading edge of the drill bit removing more material than intended. This might compromise the structural integrity of the base metal or create an undesired hole, leading to additional repair work.

On the other hand, while it is true that compound drill bits cut through multiple layers or that they may not perform as efficiently in certain applications compared to spot weld cutters, these aspects are not intrinsic downsides specific to their use. The inability to utilize the drill bit from the backside may be a limitation for some situations, but this does not define the effectiveness of the tool in terms of its primary function as a drill bit.

Overall, the key issue with compound/stepped drill bits is their propensity to create holes that may be detrimental to the base material, thus highlighting the importance of precision and care in their application during body repair work.