A remix of a great design by 4volt

Added length to handles. Any 1/4" hex bit can be used.

I push the bit in just after the print is finished while it's on the bed and still hot. PLA material will allow additional fit adjustment with hot water. I just drop it into water that was brought to a boil in the microwave.

I sometimes scale up the 38mm LongBit Handle so I can tell the difference.

Complete instructions can be found at: http://www.thingiverse.com/thing:137367

Up Date 4.9.16: Uploaded handles v2.1 with slight chamfer on the opening for easier bit install. (like butter) Added a 2x long handle 50 mm long & a 20 mm spacer. Can use longer handle with short bit + spacer. Can cut spacer to length. Magnetizer / Demagnetizer can be found on eBay.