Check out the 90 Degree Drill Guide | Tall Guide for Longer Screws or Bits | 90 Degree Screw Guide and other Tools products from Superhero DIY. Just $5.39 with fast shipping!
Simple drill and screw guide. Helps to drill perpendicular holes and screws. Tested over with my pergola project. Works fine. Super easy to get 90 degree angle. Scale for smaller objects. This one is designed for long (30cm) drill bits. Additional pad for better finger hold included.Design credit

Wolfcraft Portable Multi-Angle Drill Guide with Drill Chuck

90 Degree Drill Guide 3/4/5/6/7/8/9/10MM Doweling Jig Drill Bit

Kreg Shelf Pin Jig - 1/4 Shelf Pin Drilling Jig

90 Degree Drill Guide, Tall Guide for Longer Screws or Bits

What Best Screw Size for a Wood Fence? - Perimtec

Toyota Highlander broken climate control knob mount fix - SuperheroDIY

Kreg 90-Degree Pocket Hole Driver Drill Attachment with 3 in

Making the ULTIMATE Drill Guide With CNC Parts : 19 Steps (with

Toyota Highlander broken climate control knob mount fix - SuperheroDIY

Milescraft DrillBlock Hand-Held Drill Guide 1312 - The Home Depot

Choosing the Right Screwdriver Bit - iFixit Repair Guide

Rockler Portable Drill Guide: Your Ultimate Solution for Accurate

Toyota Highlander broken climate control knob mount fix - SuperheroDIY

Levoite™ 30 45 90 Degree Angled Drill Hole Guide Jig for Stair

90 Degree Drill Guide Tall Guide for Longer Screws or Bits 90