The Petzl Torse clips securely onto the back of your sit harness and loops up over your shoulders and holds the Croll in position. It offers a little more back support than "bra style" chest harnesses. It is easily adjustable before a pitch or to fit different sizes of caver.
Petzl's Perfo Spe Anchor Driver is a hand drill for use with 8mm self drilling anchors such as the Petzl Cheville. It is compact and lightweight, with a pivoting handle to assist with grip in damp cave conditions. Petzl have instructions for use with the Cheville expansion bolts here
The Petzl Bolt Bag is great for organising your hammer, bolting gear and other equipment that you may be using. A large buckled pocket allows for secure storage and a small internal pocket helps organise smaller bits. The bolt bag also has an external holster for easy storage and axes to your hammer.
The Petzl Vrillee Twist Hanger is a simple hanger for 8mm bolts with a twist so that it holds a karabiner parallel to the rock. This can be an advantage in places where the rope is likely to be re-ascended rather than pulled through, although it can cause the rope to rub on the rock in certain placements.
The Petzl Secur is a shoulder strap system for positioning the Croll chest rope clamp and attach to Avao Sit, Falcon, Falcon Ascent and Sequoia SRT harnesses.
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.
The Petzl Ascentree is a clamp for ascending trees using double ropes and footlocks or pantin foot ascenders. The cam is chrome-plated steel with angled teeth and self-cleaning slot to grip the rope even when muddy or icy. It is integrated into the clamp to stop rubbing.
The Petzl Vertex Foam Liner are replacement foam liners for Vertex Helmets: absorbs perspiration and is machine washable.