Pro-Tech - Bevel Trim Bit 1/2' X 3/8' Three Flute 22 1/4' Shank - Pro-Tech - Bevel Trim Bit 1/2' ...

consider safety for your health and the people around you
General safety suggestions: It is advisable to always have the following items nearby and in a good condition Eye protection clean and scratch free Hearing protection quality earmuffs Dust masks discard old and dirty masks Gloves for easy handling of material and hand protection
Wear Gloves	Eye Protection	Hearing Protection	Dust Mask

To use router bits safely (and to get the best results from your router), the router bits need to be installed properly into the router's collet. Improper installation of your bits can cause excessive chatter and could increase the likelihood that the bits will break when in use. 

Clean and sharp

First of all, before beginning any routing operation, check your bits to make sure that they are clean, relatively free of pitch, and most of all, sharp. If the bit is dull, chipped, is excessively burned or has any other defect, it should be sharpened or replaced before use. 

Correct collet and collet nut fit

Most router collets have a recess (groove) that needs to click into a circlip that resides inside the collet nut. Failing to ensure that the collet "clicked" into the collet nut will cause you to struggle to remove the router bit after tightening. This could cause the collet to break or be removed by a technical repair centre.

Correct fit inside the collet

When installing the bit into the collet, do not tighten the collet with the bit "seated." Instead, insert the bit until the shank (bit shaft) reaches the bottom of the collet, then ease it out about 2 mm before tightening the collet.

When the bit is tightened