1 in. Variable Speed Top-Handle Jigsaw Kit - DW331K. Kit Box. Variable speed delivers 500 to 3,100 SPM for optimal cutting speed for all applications. Powerful 6.5 AMP motor delivers the cutting power for the most demanding materials. Lever-action keyless blade change makes blade replacement fast and easy. All-metal gear case and keyless blade level enhances tool durability in a professional shop environment. 4-position orbital action allows for faster, more aggressive cuts. Innovative flush cut