Solid hardened steel bodies with anti kickback design. Build-up & heat resistant PTFE coating. Totally enclosed & lubricated. Industrial grade Mini-grain alloy blade.Simple construction, easy to operate.Perfect choice of professionals and hobbyists.Using for hand-making a drawer or other woodworking.Suitable for woods, MDF, particle board, plywood compact panel; Avoid cutting ferrous metal and non wood materials, such as: steel, iron, sand, etc.name: slot router bit setMaterial: alloy , steelColors: silver and yellowsize: Handle Diameter: 1/2 inch (12.7 MM)Tooth width: 1/4 inch(6.35 MM)Depth of tooth: 1/4 inch(6.35 MM)Tongue Router Bit Size: 75 x 40mm / 2.95 x 1.57 inch(L x Dia)Slot Router Bit Size: 72 x 40mm / 2.83 x 1.57 inch (L x Dia)Weight: 238 gramsFor circuit board size: 13-19mmPackage Contents:1 x Tongue router bit1 x Groove router bitSafety Code:1. The razor blade is permanently encapsulated in the blade or housing where the blade is exposed, and the blade length is less than 2 mm.2. Blade products do not apply to people under 18 years of age.3. This item is for industrial cutting / engraving only, not dangerous goods.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.