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.