An easy way to get the centre of any rectangle (without arithmetic) is to draw and X by placing your straight edge from top-left corner to bottom-right, draw a line (roughly in the middle, does not have to be full length) and repeat again from top-right to bottom-left. The centre is the point where both lines intersect. You can also find the centre of a circle by basic geometry (using Thales theorem): if you have a right angle in a [virtual] triangle and the vertex of the right angle lies on a circle's circumference, then the line segment joining the other two vertices of the triangle must be a diameter of the circle. Basically if you place the inner corner of a [framing or carpenters] square on any point on the circumference then the two points where the square intersects with the circle circumference mark the extents of the diameter (a circle has infinity many diameters, lines though the centre enclosed by the circumference, but in practice people often just say 'the diameter' implying that there is only one instead of 'a diameter' even though the latter is less likely to aggrieve your friendly neighbourhood maths nerd).

Thank You. This is a great no frills video. Very easy to follow

very helpful and detailed, thank you!!!

Very well explained. Thank you

Great video!! Very informative!!

Needed this!

I cannot believe how easy you explained this. Had to subscribe. You are awesome sir! Thank you.

Thanks for making this easy to understand.

Thank you! I'm installing a ridiculous amount of cabinet knobs & the official site wasn't as helpful showing the measurement marks. I feel a little more empowered after watching.

This was very helpful but would love seeing how you use it on an upper or lower edge of a cabinet door

How would you use the drawer pull jig for a 7" pull instead of the largest on the jig which is 5"?

💥 Very nice, thank you but I can’t draw with a pencil on the finish of my drawer faces.