Those are professional grade automotive 9 inch internal and external, straight and bent nose circlip pliers are a type of pliers designed for removing and installing circlips, which are a common type of retaining rings. External circlip pliers are made to expend the circlip rings apart in order to remove or insert the clip over the shaft or in to clip groove. Internal circlip pliers are made to compress the circlip rings together in order to remove or insert it into the clip housing. 

Features:

• Ideal for professional use, also a nice tool for the DIY-lover
• Designed to be used with automotive and machinery size of circlips
• The tool is forged of high carbon steel, heat treated with high hardness specifications
• Fine polished and corrosion resistant black finish on pliers head
• Self-opening/closing spring mechanism, the pliers will open/close when no force is applied to the handles
• With comfortable slip resistant dipped handles, the orange color is easy to see

Specifications:

• Brand: Harden
• Model: 560505, 560510, 560515, 56520
• Type: 9in internal, external, straight and bent nose
• Made of: carbon steel
• Plated: nickel finish
• Self-opening/closing spring mechanism
• Bright orange dipped handles
• Pin thickness: 2mm to 2.5mm
• Distance between pins when open, up to 1-1/8 in or 28mm
• Size of each plier: 8.5in or 220mm
• Weight of each plier: 9oz or 254g

Package includes:

• Set of 4 internal, external, straight, bent nose circlip pliers
• Retail packaging