Friends, How many times have you struggled getting multiple wires into transformer terminal blocks - then finding some are loose - and the ultimate worst, wires arcing and burning the blocks? Have you thought there must be a better way? Here it is, clamp-type terminal blocks, no screws, just easy-to-use tool-free clamps. Open the clamp, insert the wire(s), then close the clamp - a rock-solid industrial-strength connection you can't pull loose. Other features of Clamp-Connect Transformers: Available in 150W, 300W, and 600W models Timer & photocell receptacles High-performance toroidal core Clamps accept up to #10 AWG wire Removable & lockable door Stainless steel housing & door ETL Listed to UL standards for indoor and outdoor use Magnetic circuit breakers; auto-reset integrated thermal breaker (in core) Color-coding wire markers Lifetime warranty on core and housing View New VOLT Clamp-Connect Transformers. View new AMP Clamp-Connect Transformers.