H & S AUTO SHOT Stud Welder Starter Kit HS4550 The Uni-Spotter 4550 Starter Kit Plus Is a great entry level kit. This kit features the most powerful welder in a Starter Kit. Use this kit as a base to build a complete Uni-Spotter Stud Pulling System. The 4550 Starter Kit features the Uni-Spotter exclusive Ÿ??Stud Ease TechnologyŸ?�. Stud Ease holds the welding stud in the welder regardless of the direction the welder is pointed. No longer does the stud fall out of the welder when the welder is pointed in a downward direction. This design feature is exclusive to H&S AutoshotŸ??s Uni-Spotter Stud Welders. Kit Contents: 4550 Starter Welder: The UPGRADED 4550 Starter welder is the most powerful Starter welder on the market. It is 110 volt and comes with a built in overload relay to protect the transformer from overheating. The trigger is mounted in the handle for easy operation. The 4550 Welder features Ÿ??Stud Ease TechnologyŸ?�, exclusive to Uni-Spotter. 1001 Flexpert Welding Studs: The 1001 Flexpert Welding Studs are the most popular stud sold. They are 2.2 mm copper coated and have been specially designed for easy welding and easy removal after the pulling is complete. The shafts are strong yet flexible. This is the preferred stud for use with slide hammers. 1004 Stud Welding tip: The 1004 stud welding tip can be used with all welding studs up to 2.6 mm in diameter. Designed with a Morse Taper for a positive fit with an easy removal. 1016 Deluxe Slide Hammer: The 1016 Deluxe Slide Hammer has been designed with a 4-jaw collet which firmly grips the stud and does not let go till you release it. The Ÿ??TŸ?� Handle gives the operator a comfortable ergonomic grip. The tapered head allows for tapping the panel close to the stud.