Slotted Shim Assortment Kit, 2 X 2 in, .001 1 8" Thick, Full Asst ORS NASCO Replacement sensor for Gas Alert Replacement sensor for Gas Alert Micro Clip XT and Gas Alert Micro Clip XL Also works with GasAlert Extreme Upper and lower tongs are made from a high copper alloy for maximum conductivity and strength Top and bottom tip insulators are a molded fiberglass compound and will withstand intensive heat impact Handles are molded from a durable glass filled nylon material with a good heat and impact resistance Oval point screw cable connection is standard on all models pumps generators and other plant machinery Shims marked with thickness in decimal and metric Slotted shim is the best way to solve alignment and leveling problems on motors