strap drill

tool

Also known as: thong drill

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The Information Architects of Encyclopaedia Britannica

Last updated

July 14, 2026

Quick Summary

A strap drill is a simple tool used for drilling holes. It operates by twisting a thong, or strap, around the shaft of the drill. Pulling on the ends of the thong causes the shaft to rotate, allowing it to bore into a material. This method of rotation, using a thong, was an early technique for achieving more efficient drilling compared to manually twirling a stick between the palms. The strap drill could be used with an abrasive or with a pointed tool attached to the end of the stick.12

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hand tool
Drilling and boring tools
Such a strap, or thong, drill could be applied to drilling either with an abrasive or with a tool point hafted onto the end of the stick. The upper end of the shaft required a pad or socket (drill pad) in which it could rotate freely.
Read More
Such a strap, or thong, drill could be applied to drilling either with an abrasive or with a tool point hafted onto the end of the stick. The upper end of the shaft required a pad or socket (drill pad) in which it could rotate freely.
Read More