These simple accessories let you use the hardest drill bits with less risk of snapping them.

Draper 20229 Drill Guide, 4/5/6/8/10/12mm Drill Block, Angle Drill Guide
4.0

KWB DRILL GUIDE/DRILL JIG Ø 44899 MM DRILLBLOCK FOR PRECISE AND STRAIGHT DRILLING ON SURFACES, ROUND MATERIALS, AND EDGES INCLUDING GRIP POINTS
5.0

QWORK® Woodworking Center Finder Kit, Drill Guide Locator with 3/4/5/6/7/8/9/10mm Drill Bushings
5.0