Used to hold electrode during the welding process. Available in two types: Fully Insulated (A-Type) Semi Insulated (B-Type) Three varieties are available in both these types: Mark-I (600A30%): Suitable for all size of electrode Mark-II (400A30%): Suitable up to 4.0 mm electrode Mark-III (200A30%): Suitable up to 3.15 mm electrode Other than the above, two more special varieties of holders are available: Heavy Duty Holder (used for heavy duty welding) Rubber Grip Screw Type Holder