https://www.jpcorry.com/jp-corry-products/gripit-fixings-marxman-deep-hole/
GRIPIT Fixings - MarXman Deep Hole
Description
The perfect drilling companion for electrical, plumbing, building and DIY jobs. Marks a fixing point through fitting depths (between 45mm and 100mm)
Trusted marking tool for Trade & DIY a Toolkit Essential!
Marks all surfaces including brick, metal, wood, pebbledash & ceramic - just about everything!
250+ bursts of removable fluorescent green pigment (non-toxic) in every pen.
Can be used at any angle or height.