Product review (5 stars): Includes More Than The Picture Shows
This is being written immediately after installing this kit in my Whirlpool LEB6300PW1 dryer.  I paid $29.50 for this kit, but the price has since fallen to $25.50.

After twice replacing the heating element only (with&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Dryer-Heating-Element-279838-For-Whirlpool-Kenmore/dp/B001DHLGOS/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Dryer Heating Element 279838 For Whirlpool/Kenmore</a>, then&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Replacement-Dryer-Heater-Heating-Element-for-279838-3403585-PS3343130-AP3094254/dp/B00F982Q6E/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Replacement Dryer Heater Heating Element for 279838 3403585 PS3343130 AP3094254</a>), and having each element last about a year, I decided to replace both the element and all thermal sensors, hoping for a more long-lasting repair.

The picture for this product is inaccurate; the kit actually includes 4 thermal sensors and 1 thermal fuse.  The included sensors are&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Whirlpool-3977767-Thermostat/dp/B00DM8KR1E/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Whirlpool 3977767 Thermostat</a>&nbsp;(NOT SHOWN IN THIS PRODUCT'S PICTURE),&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Whirlpool-3387134-Fixed-Thermostat-for-Dryer/dp/B0053F7TQA/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Whirlpool 3387134 Fixed Thermostat for Dryer</a>,<a data-hook="product-link-linked" class="a-link-normal" href="/3977393-THERMAL-FUSE-FOR-WHIRLPOOL-DRYER/dp/B00HMVPQLI/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">3977393 THERMAL FUSE FOR WHIRLPOOL DRYER</a>, and&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Whirlpool-3390291-Fixed-Thermostat-for-Dryer/dp/B0053F7UV4/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Whirlpool 3390291 Fixed Thermostat for Dryer</a>&nbsp;(NOT USED).  The thermal fuse is&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Whirlpool-3392519-Kenmore-Dryer-Thermofuse/dp/B000NCTOUM/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Whirlpool 3392519 Kenmore Dryer Thermofuse</a>.

Don't let going into the back of your dryer intimidate you.  It's easy to get in and replace all of these parts.  You can find really nice assembly drawings at searspartsdirect.com.  A battery-powered driver with a 1/4" socket will greatly speed things along.  Basically, you UNPLUG THE DRYER, remove the back panel, replace the heating element, then replace the sensors.  All of them are in the very back where they are easy to get to.  Tackle them one at at a time.  Remove the old sensor from the dryer (leaving wires attached), and install the new sensor.  Then move the wires one at a time from the old sensor to the new sensor, making sure to connect each wire to the same terminal.  In this way you will make sure that the new wiring connections exactly match the original wiring.  Sensor 3977767 attaches to this kit's heating element in a slightly different way than the original.  Use a pair of needle-nose pliers to bend the metal tab as needed to secure one of the sensor's screw-holes.  It's impossible to incorrectly orient the sensor, because the other side attaches to a fixed wiring terminal.  Total time for the job will be about half an hour to one hour, without hurrying.

As noted, the kit included a few parts that my dryer did not have, especially Dryer High-Limit Thermostat #3390291.

APRIL 2017 UPDATE:  The element lasted just over a year.  This is at least as long as other heating elements I have tried.  Currently I suspect that vibration from a front-loading washing machine may be making my heating elements fail much more quickly than they otherwise would.