【Support Continuous Firing Mode Arbitrarily】There is a valve plate and a dial beside the trigger, which is the key to start and adjust the staple gun working mode. ①Press the plate is the Single Shot Mode.②Release the plate is the Continuous Firing Mode.A dial has the ability to adjust the firing frequency, gives you flexible control in staples shooting speed to adapt to your different working demand 【Quiet & Comfort】Hidden silencer in the air exhaust decreases the noise maximally. Ergonomic rubber grip has good grasp 【Durable & Powerful Motivation】A strong cylinder is built in light-weight aluminium alloy housing for providing plenty of power 【Compatible Fasteners】 Drives 21 gauge 80 series staples. Staples Crown: 1/2" (12.8mm), Staples Leg Length: 1/4" to 5/8" (6-16mm) **Staples are not included with this product**Large capacity magazine allows you to load staples up to100 pcs at one time. Reloading staples in rapidity 【Application】It's ideal tool in DIY and home upholstering for woodworking、furniture making and fabric attaching