Mostly screwfix pencils lol. God they are crap. One straight line on the floor and it’s gone! Must get some decent ones Sent from my iPhone using Tapatalk
Anyway I don’t use a pencils at all Always a pen if I need to draw on a tile which is very rare I use maskIng tape It’s easier to see more accurate and no need to rub off pencil marks
Whatever I find in the house or premises I'm working in. Used a fountain pen in the past Sent from my SM-G950F using Tapatalk