Caving
Here is a guide on the essential kit for every Caver.
If you're looking to put together your own SRT kit, here is a handy guide on what you'll need.
Petzl
Coudee Simple Hanger
The Coudee is a simple hanger for use with 8mm spits that holds the karabiner or maillon perpendicular to the rock, thus reducing rope abrasion. This is useful for situations where a pitch is to be rigged as a pull through, but could increase wear on karabiners if the rope is to be re-ascended. In this situation, a Vrillee twist hangerwould be better.
Petzl
Rocpec Drill
The Petzl Rocpec Drill is a hand drill designed for aid climbers and cavers. The drill accepts SDS drill bits and can drill holes of varying depths and diameters for all types of anchors. The lightweight drill is easy to set-up and dismantle and doesn't need additional tools.
Petzl
Freino
The Petzl Freino is a twist-lock karabiner that incorporates an integral braking system for improving friction on descenders and belay devices. Works extremely well with the Grigri when using slimmer ropes such as the Beal Booster, which can normally be a struggle. The Freino is ideal for adding or adjusting friction during descents.
Petzl
Stop
The Petzl Stop is a popular choice of descender, thanks to it being easy to use and having the backup of the automatic brake (remember to lock it off if you've stopped though!). It can also be used instead of a chest jammer in an emergency on short pitches. The downside is that it can get a bit warm on long descents of a dry rope (think Alum pot North West) so take a squeezy bottle of water with you!