Must have tools and save the cylinder to rebuild the cylinder 1. The adjustable gland nut wrench is an excellent product that has been proven to dismantle hydraulic cylinders used in a wide variety of heavy/light equipment. No more risking damage to your hands by smashing stubborn gland nuts. Allows you to disassemble all hydraulic cylinders on equipment/box/vehicle to replace several static tools that can only be installed once. 2. Large adjustable gland nut wrench provides custom fit for 2" to 6" diameter gland nuts, reversible to fit 1/4" and 5/16" diameter pin holes, and 3/4" diameter pin holes easy to use with the square drive.3. Small adjustable gland nut wrench that provides custom fit for 1" to 3-3/4" diameter gland nuts, flips over to fit 1/4" as well as 7/32" diameter pin holes, Easy to use ratchet with 1/2" driver. Package includes: 1 large adjustable compression nut wrench and 1 small adjustable compression nut wrench. Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.