durable: fully welded frame for superior durability and strength. quick-connect ram: the quick-connect ram accepts 3 different punch sizes self-retracting rams: power unit includes self-retracting rams. safety load-limiting valve: prevents use beyond the working capacity range of the press. glycerin filled gauge: power unit includes shock-absorbent glycerin filled gauge for longer life and accurate readings. includes: bearing shield, 3 punches and 2 bed plates.