To accurately set drill depth, simply place a DrillStop ring over the drill bit at the required depth, then drill until the ring is reached.
Marxman Multi-Surface Drill Hole Marking Tool For 50-100mm Fixture
Makita USA - Product Details -324219-0
Draper TCT Router Bit, 1/4 Flush, 12.7 x 25mm 75335
Metex DrillStop – Drill Depth Indicator
Depth Stop Drill Bit, 18 Piece Drill Stop Collar Set Positioner
Marxman Multi-Surface Drill Hole Marking Tool For 50-100mm Fixture
Depth Stop Drill Bit, 18 Piece Drill Stop Collar Set Positioner
Makita Canada Inc
Wolfcraft Drill Guide - Screwfix
Metex DrillStop Hi-Vis Drill Depth Indicator Rings 18 Pack