Rockler Woodworking Clamp-It & Deluxe Kit: Use our bar clamp set on framework or on casework, and with any joinery technique, from nails to hand-cut dovetail. 90 Degree Positioning Squares Features: Align it, clamp it and fasten it for perfect 90° angles every time?Clamp-It deluxe kit includes everything you need - Corner square tool is held in place on their corresponding squares with friction fit for easy one-handed operation - The original Clamp-It cabinet clamps assembly Square measures 8 x 8 x 1-1/2 - Mini Clamp-It Assembly Square measures 4 x 4 x 1-1/4 - Assembly woodworking square is manufactured from high impact, rigid polycarbonate - Bar clamps have fixed heads, movable tailpieces, and ergonomic handles. --- Tech Specifications: Clamp-It: Material: Rigid polycarbonate - Overall Dimensions: 8 x 8 x 1-1/2 --- Clamp-It Bar Clamp: Throat Depth: 3/4 (to the center of the jaw) - Clamp Maximum Opening Capacity (without Clamp-It): 4-1/2 - Clamp Maximum Opening Capacity (mounted to Clamp-It): 2-1/2 --- Mini Clamp-It: Overall Dimensions: 4 x 4 x 1-1/4 square - Material: Polycarbonate. --- Mini Clamp-It Bar Clamp: Nominal Length: 4 - Maximum Opening (clamp alone): 2-3/8 - Maximum Opening (with optional Mini Clamp-It): 1-1/8 - Minimum Opening: 1-1/4 (applies to clamp alone; clamp closes entirely if used with optional Mini Clamp-It) - Throat Depth: 1.