Product Description: Essential tools for cylinder maintenance and rebuilding. 1. The adjustable compression nut wrench is an outstanding tool that has demonstrated its effectiveness in disassembling hydraulic cylinders found in various heavy and light equipment. No more risk of injuring your hands while tackling stubborn gland nuts. This tool enables you to remove all hydraulic cylinders from your equipment or box or vehicle, replacing less versatile static tools that can only be used once. 2. The large adjustable gland nut wrench provides a custom fit for gland nuts ranging from 2" to 6" in diameter, and is reversible for 1 or 4" and 5 or 16" diameter pin holes, with three convenient uses for square and 1 or 4" diameter pin hole drives. 3. The small adjustable gland nut wrench can be tailored to accommodate gland nuts from 1" to 3-3 or 4" in diameter, and can be flipped to fit 1 or 4" and 7 or 32".