Sinisite Pickaxes are used to mine ores and many other types of blocks. The Sinisite Pickaxe has a mining level of 5. This mining level means the Sinisite Pickaxe can mine all base materials in Minecraft (including Obsidian, but obviously excluding Bedrock), and most ores from other mods.
The Sinisite Hoe can be used to till dirt and grass blocks into farmland, which can be used for growing crops. Using a Sinisite Hoe to break blocks will not use durability, however it will take just as long as if you were not using any tool at all.
All Sinisite Tools can be repaired in an Anvil using a Sinisite Ingot, providing you have the necessary Experience to cover the repair cost, except for Sinisite Bows, which require a Sinisite Rod for repair.