Parametric Magnetic Driver Bit Handle

by JoeyC, published

Parametric Magnetic Driver Bit Handle by JoeyC Nov 18, 2012

Featured Thing!


Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Thing Statistics

9993Views 1897Downloads Found in Hand Tools


Fully configurable magnetic handle for 1/4" driver bits.

I couldn't find a handle I liked for some metric driver bits I had gotten. So I designed this one.

It uses an 8mm magnet to hold the bits in place, and is easy to change to suit your preferances.


1) Print.

2) Glue 8mm magnet into handle.

3) Screw (or unscrew) something!


The OpenSCAD file is easy to change. The varibles defined at the top of the file configure the handle. You can change the handle diameter and length, the shape/size of the finger grips, and the size of the magnet used.

Also the bit size is changable to adjust for a tight fit on your printer, or to use different size bits. Note that the hex hole for the bits is draw using a six sided circle so the bit diameter will not match the bit size. A bit of trail and error is needed.

The variables are as follows (all dimensions in mm):

MagDia: Magnet hole diameter, adjust as needed to get a good fit with your magnet. The magnet needs to slide into the handle so don't make it too tight.

BitDia: Driver bit hole diameter, adjust as needed to get a good fit with your setup.

BitDth: Depth of hole for bit

HandDia: Outer diameter of the handle
HandLen: Handle length

VertDia: Diameter cylinder used to cut out vertical grip slots.

VertOff: Offset of vertical slots from outer edge, larger numbers mean a shallower slot.

GripDia: Diameter of circle used to creat the grip depression near the end of the handle.

GripDth: Depth of finger grip.

GripRatioTop: Height to width ratio of oval used to cut the top half of the finger grip.

GripRatioBot: Height to width ratio of oval used to cut the bottom half of the finger grip.

GripOff: Offset from bottom of the handle to the finger grip.

More from Hand Tools

view more

All Apps

Customizer is the easiest way to take great 3D printable designs and make them your own. Make your OpenSCAD designs infinitely more valuable by empowering the community to customize them.

App Info Launch App
Customizer Thing App

Auto-magically prepare your 3D models for 3D printing. A cloud based 3D models Preparing and Healing solution for 3D Printing, MakePrintable provides features for model repairing, wall thickness...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Quickly Scale, Mirror or Cut your 3D Models

App Info Launch App

Awesome!  I have a set of drill bits with 1/4" bases.  I use them to clean/dress holes.  This is what I need!